22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



Length of forewing 11-14 mm. 



Male genitalia, as illustrated by figm-e 10, with upper distal angle 

 of lateral lobe of uncus rounded, lower distal angle also rounded and 

 somewhat produced (often greatly so), causing distal margin to be con- 

 cave. Variation in the unci of a single species is unusual in Calycopis 

 and at first two species were thought to be represented here. One 

 showing a greatly extended lower distal angle (fig. 21/) is particularly 

 common in Costa Rica but also occurs in Mexico, Guatemala, Hon- 

 duras, British Honduras and Panama. The other with this angle not 

 greatly extended (fig. 21e) is also common in Costa Rica and is found as 

 well in Mexico, Hondm-as and French Guiana. Intermediates (fig. 10) 

 have not been found in the northern part of its range but do occur in 

 the Canal Zone, Panama, Colombia and Venezuela. Because of the 

 presence of intermediates and because of the fact that there is no 

 correlation between these differences in the unci and the slight habitus 

 differences reported above, I treat these forms as variations of a 

 single species. Eighth tergite (fig. 20k) with posterior concavity more 

 narrow and deeper than in C. isobeon. 



Female (figs. 87-90). — Not distinguishable from females of isobeon. 

 This sex can be identified only by association \vith males. 



Length of forewdng 9-13 mm. 



Female genitaha, as illustrated by figures 21a-d, very variable and 

 not differing from isobeon or cecrops. 



Type-locality. — Territory of Guyane, Cayenne, French Guina. 



Additional type data. — Described from the holotype, male (lo- 

 cahty as given above; USNM type 34899; William Schaus Collection; 

 male genitalia preparation WDF 2712, 1948), allotype, female (same 

 data as the holotype; female genitalia preparation WDF 2707, 1948) 

 and from five male and two female paratypes from Cayenne and from 

 Maroni River, French Guiana. Note: Many additional specimens 

 of both sexes were studied but not included in the paratype series 

 because of the variation in the genitalia. The association of the 

 allotype and two female paratypes with the French Guiana males is 

 thought to be accurate because isobeon is not known to occur in 

 French Guiana. 



Location of types: Holotype, allotype, three male and one female 

 paratypes in the United States National Museum. One male para- 

 type and one female paratype in the British Museum (Natural 

 History) . One male paratype in the American Museum of Natural 

 History. 



Distribution. — Alexico south through Central America to Ecu- 

 ador, Colombia, Venezuela, and French Guiana. 



Mexico: State of San Luis Potosi, El Bonito (June), El Pujol (July); State of 

 Vera Cruz, Jalapa, Santa Rosa (April), Presidio (April, June); State of Nayarit, 



