Riverside County

Thirty-two Sphingidae species are listed in the USGS for California. Not all of the species are reported by USGS or anticipated in Riverside County.

It is hoped that this checklist, with the thumbnails and notes, will help you quickly identify the moths you have encountered.

A WO" after the species name indicates that I have no confirmed reports of this species in Riverside County, but I (William Oehlke) expect that this moth may be present.

A USGS indicates the moth is reported on the USGS website and/or in Moths of Western North America, #2. Distribution of Sphingidae of Western North America, revised, an excellent little booklet available through Paul Opler.

This page is inspired by and dedicated to Peter Sidoruk. Peter sent me the image of the immature Eumorpha achemon larva at the top of the page. The larva is feeding on grape and will lose the anal "horn" as it sheds its skin to move into the fifth instar.

Many thanks to Ted and Sonia Abahazi who sent the Manduca sexta image at bottom of page.

Please help me develop this list with improved, documented accuracy by sending sightings (species, date, location), preferably with an image, via email to Bill Oehlke.

Sphinginae subfamily Sphingini tribe: Agrius cingulata USGS This species is enountered in Riverside County and in other southern California counties. The moth is a very strong flier and is frequently encountered far north of its usual range. Manduca quinquemaculatus USGS, the Five-spotted Hawkmoth This large bodied moth flies in tobacco fields and vegetable gardens (potatoes, tomatoes) and wherever host plants are found. Manduca rustica USGS, the Rustic Sphinx This species is recorded in Riverside County. I would not be surprised to get reports although Riverside would be the northern limit of its range in California. Look for three large yellow spots on each side of the abdomen. Manduca sexta USGS, the Carolina Sphinx This species is recorded in Riverside County. If you grow tomatoes, you have probably encountered it. Larvae get very large and can strip a tomato plant. Manduca sexta Corona, August 26, 2007, courtesy of Ted and Sonia Abahazi. Sphinx chersis WO, the Northern Ash Sphinx or Great Ash Sphinx The upperside of the forewing is soft dark gray to blue-gray with a series of black dashes, one of which reaches the wing tip. Sphinx perelegans USGS, the Elegant Sphinx Sphinx perelegans adults fly in montane woodlands and mixed chaparral-type vegetation as a single brood in the north, with adults mainly on the wing in June and July. It flies from dusk until after midnight. Sphinx sequoiae USGS, the Sequoiae Sphinx This species is reported in Riverside County. Adults fly as a single brood in the desert and in pinyon-juniper woodland from May to August. Smerinthini Tribe: Pachysphinx occidentalis USGS, the Big Poplar Sphinx This one is quite similar to Pachysphinx modesta, with modesta being smaller and darker. Moths should be on the wing from June-August. Smerinthus cerisyi USGS, the Cerisyi's Sphinx or One-eyed Sphinx, Larvae feed on poplars and willows. Flight would be from late May-July as a single brood. Smerinthus saliceti USGS, the Salicet Sphinx, flies in valleys and along streamsides from Mexico City north to west Texas, southern Arizona, and extreme southern California. Larvae feed on poplars and willows. Flight would be from late April-September, probably as a double brood. Macroglossinae subfamily Dilophonotini Tribe: Aellopos clavipes USGS, the Aellopos Sphinx. The body is dark brown with a wide white band across the abdomen. Wings are dark brown. The forewing has a black cell spot and 3 white spots near the pale brown marginal area. Callionima falcifera WO This species is reddish, has falcate wings and flies after midnight. It is very questionable for Riverside County, but may stray into that area. Erinnyis crameri, the Cramer's Sphinx, USGS This species is more likely to occur as an occasional stray rather than as a breeding resident. As a migrant stray it would be seen later in the season, July-August. Erinnyis ello, the Ello Sphinx, USGS The abdomen has very distinct gray and black bands. Adults nectar at dusk so you may see them in the garden at that time. Erinnyis obscura, the Obscure Sphinx, USGS During the night adults nectar at flowers, including bouncing bet (Saponaria officinalis) and Asystasia gangetica beginning at dusk. July and August are flight times in the southern states. Hemaris thetis USGS, the Thetis Clearwing or Bee Hawk Moth, The moth flies along forest edges and in meadows, gardens and brushy fields. Day-flying adults nectar at lantana, dwarf bush honeysuckle, snowberry, orange hawkweed, thistles, lilac, Canada violet, etc. Philampelini Tribe: Eumorpha achemon USGS, the Achemon Sphinx This moth is reported for Riverside County, and should be fairly common. Fight would be from June to August. Larvae feed on grape foliage. Eumorpha fasciata WO, the Banded Sphinx This moth is a very strong flier and is often reported far north of its normal range. It would be a rare stray to Riverside if it is at all present. Macroglossini Tribe: Arctonotus lucidus USGS, the Pacific Green Sphinx Moth or Bear Sphinx This species is confirmed in Riverside County. It tends to be an late winter-early spring flier, on the wing in the early evening. It comes to lights at night. Euproserpinus phaeton, the Phaeton Primrose Sphinx, USGS Adults nectar at flowers during the warm parts of the day. Euproserpinus phaeton adults fly swiftly and close to the ground over dry washes and flat areas in deserts as a single brood from February-April. Hyles lineata USGS, the White-lined Sphinx Adults usually fly at dusk, during the night, at dawn, and during the day. Moths nectar at salvia and other flowers and oviposit on Epilobium cana (California fuchsia) and Hooker's Evening Primrose, and others. Proserpinus clarkiae USGS, Clark's Sphinx, Adults fly in the afternoon from April-June in oak woodland and pine-oak woodland in foothills, nectaring from chia, heartleaf milkweed, golden currant, bluedicks, fairyfans, vetches, thistles, hedgenettles, etc.

Manduca sexta sexta, Corona, California, August 25, 2007, courtesy of Ted and Sonia Abahazi.

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