June, 1920] Horseflies From Middle America 319 



Dichelacera caloptera n. sp. 



Length of the female about 12 milHmeters. Front gray poUinose, 

 frontal callosity as wide as the front, shining black, about as high as 

 broad, angulate above; face with a prominent shining callus, palpi 

 yellow. Antenna yellow except the annulate portion of the third seg- 

 ment which is dark, basal extension of the third segment slender, reach- 

 ing half the length of the segment. Thorax yellow dorsally with a black 

 band between the wing attachments scutellum black; front femur 

 yellow with a brown apex, front tibia yellow basally, otherwise brown, 

 front tarsus dark brown, middle leg all yellow except the tarsus which 

 is pale brown, hind femur yellow, brown at the apex, hind tibia and 

 tarsus dark brown nearly black. Wing clear black with a pale yellowish 

 area which includes the second basal cell and basal parts of the discal, 

 first, fourth and fifth posterior, first submarginal and a small area in 

 the marginal cell. See Figure 4. Abdomen dorsally, first segment pale, 

 following segments each dark on the anterior half and pale on the 

 piosterior half. 



' Length of the male 12 millimeters. Colored like the female and 

 easily associated with it. 



"■ Holotype female from the State of Colima, Mexico, collected 

 by, L. Conradt, and allotype male from Venodio, Mexico, 

 Rusche collector, in the United States National Museum. A 

 paratype female from Venodio, Mexico, Rusche collector, in 

 my collection. 



Ohio State University, Columbus, Ohio. 



