Neococytius cluentius
Updated as per (Belize), November 2007
Updated as per Fauna Entomologica De Nicarauga, November 2007
Updated as per The Known Sphingidae of Costa Rica, November 2007
Updated as per personal communication with Vladimir Izersky (early September, late November, Coviriali, Junin, Peru, 662m), December 20, 2008
Updated as per personal communication with Ezequiel Bustos (Aguas Blancas, Salta, Argentina, 405m); December 2009
Updated as per SHILAP publication: Lista de Sphingidae del Uruguay, September, 2010; Msc Gabriela Bentancur Viglione; January 31, 2011
Updated as per personal communication with Gregory Nielsen (Colombia: Meta; 500m; February 23, 2011, 120mm); March 6, 2011
Updated as per French Guiana Sphingidae; March 9, 2011
Updated as per personal communication with Andres Urbas (near Kaw Mountains, French Guiana, March 31, 2011); April 19, 2011
Updated as per personal communication with Robin Crain (La Selva, Heredia, Costa Rica); September 27, 2012

Neococytius cluentius
nee-oh-koh-SIT-ee-usmm klue-EN-tee-us
(Cramer, 1775) Sphinx

Neococytius cluentius from Rancho Grande, H. Pittier National Park, Venezuela
courtesy of Paolo Mazzei.

This site has been created by Bill Oehlke at
Comments, suggestions and/or additional information are welcomed by Bill.


Family: Sphingidae, Latreille, 1802
Subfamily: Sphinginae, Latreille, [1802]
Tribe: Sphingini, Latreille, 1802
Genus: Neococytius Hodges, 1971 ...........
Species: cluentius (Cramer, 1775)


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The Cluentius Sphinx, Neococytius cluentius (Wing span: 5 1/2 - 6 5/16 inches (14 - 16 cm)], flies in tropical and subtropical lowlands in the "West Indies", the specimen type locality, and from the southern U.S. (strays: north to Mississippi, northern Illinois, and southern Michigan) and
Belize: Corozol, Cayo, Stann Creek, Toledo;
Guatemala: Izabal (JM);
Nicaragua: Rio San Juan;
Costa Rica: Guanacaste, Puntarenas, Lemon, Alajuela, Heredia, San Jose, Carthage; through
Colombia; Meta (GN);
French Guiana: Kaw;
Peru: Junin (662-950m) to
Argentina: Salta (405m EB); Antilles, and into
Bolivia: Santa Cruz: Andrés Ibáñez, Potrerillos del Güendá; Andrés Ibáñez; Ichilo, La Víbora; Buena Vista; Parque Nacional Amboró, Río Saguayo; Santa Cruz: Ñuflo de Chávez, Esperanza; Ichilo, Buena Vista, 750m, Sarah, 450m; Cochabamba; and

Neococytius cluentius, La Selva, Heredia, Costa Rica,
courtesy of Robin Crain.

Robin Crain writes, "I'm a high school science teacher in Spokane, WA. On a recent trip to La Selva I came across the moth on the attached photo. The size was amazing (to me anyway) but more amazing was a behavior that the moth exhibited. I went to gently lift the side of the wing to view the bright orange spotted abdomen and the moth jettisoned a large amount of liquid from its posterior. I'm guessing it was urine or water and a defensive behavior. I jumped back and the moth remained looking just as contented as before. Any insights as to the moth species and behavior? I do have several additional pictures but the attached is the best. Thanks."

I reply, "Thanks for sharing beautiful image of Neococytius cluentius, the Cluentius Sphinx.

I suspect this moth is newly emerged from its pupal shell and probably has not even flown yet. While it the pupal stage, the developing moth was accumulating metabolic wastes which it was unable to discharge. Many Sphingidae and Saturniidae will release that waste just prior to their first flight or when disturbed. Otherwise, the fluid could be a discharge as you have suggested.

I suspect it also flies in Guyana and Suriname.

The upper side of the forewing is a grey to blurry black with pale orange to pale beigey-brown markings. The upperside of the hindwing is black with orange at the base and orangish yellow patches between the veins, forming a band across the wing.

Neococytius cluentius, resting by the side of a track near Sherwood Forest,
Portland, Jamaica, July 2004, courtesy of Tony and Pat James.

The proboscis is over nine inches long.

Both males and females come to lights.

Neococytius cluentius, female, courtesy of Hubert Mayer


Neococytius cluentius adults nectar at flowers and brood continuously, having at least three generations, in the tropics:
1) December-January;
2) May-June; (July in Jamaica)
3) October.

Andres Urbas reports a March 31, 2011, flight near KAW Mountains, French Guiana.

Neococytius cluentius, near Kaw Mountains, French Guiana,
March 31, 2011, courtesy of Andres Urbas.

Females begin flight shortly after midnight and continue til 2:30 am while males fly from 1:30-4:30 am.

In Bolivia specimens have been taken in March-April-May-June, August, October-November-December.

Vladimir Izersky reports them on the wing in Coviriali, Junin, Peru, in early September and in late November.

There is at least a February flight in French Guiana.

Gregory Nielsen reports a February 23, 2011, flight in Meta, Colombia.

Neococytius cluentius, Colombia. Depto Meta: Villavicencio-Villacentro
04°03’55.0 N 073°41’87.0 W, 500m 23- ii-2011 leg. G. Nielsen,
id and slight digital repair by Bill Oehlke


Pupae probably wiggle to surface from subterranean chambers just prior to eclosion.

Neococytius cluentius courtesy of Vladimir Izersky


Females call in the males with a pheromone released from a gland at the tip of the abdomen.


Caterpilars feed on plants in the custard apple family (Annonaceae) and the piper family (Piperaceae). Ipomoea batatas of the Convolvulaceae family has been reported as a host.

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