36 PEOCEEDINGS OF THE NATIONAL MUSEUM VOL.73 



ever, very distinctly subshining black. Fii-st segment with a small 

 pair of median marginals; second with a normal pair; third with a 

 marginal row; the fourth has the usual row of bristles mixed with 

 long hairs. 



Genitalia brownish-black, both pairs of forceps moderately elon- 

 gated, the inner bent up at tip, the outer ones slender with parallel 

 sides, the tip bluntly rounded. 



Legs black, front pulvilli longer than the last two tarsal joints; 

 hind tibia ciliated on the outer side with dense sloping bristles of 

 imiform size, mostly in a single row. 



Wings brown, calypters varying from nearly white to brown. 



Female. — Front 0.33 to 0.35 of the head width at vertex, the para- 

 facials with denser white pollen than in the male, so that the dark 

 ground color shows through much less distinctly, the frontal bristles 

 are mostly in a single row with the addition of three proclinate orbit- 

 als; the hairs of the parafrontals are much shorter than in the male 

 and are inclined in several directions. Spines of hind coxae long and 

 stout as in spinicoxa. Ciliation of hind tibia coarser and less regular 

 than in male. 



Length, 11.5-14 mm. 



Redescribed from 82 specimens of both sexes; 35 of these were col- 

 lected in southern Brazil by H. H. Smith and received from the 

 American Museum of Natural History; from the same museum there 

 is one from Coparo, Trinidad, Eleven specimens were received from 

 Prof. Jas. S. Hine, including five from Bartica, British Guiana, 

 April 13-May 4, 1901; one from Puerto Barrios, Guatemala, March, 

 1905, and four from Holguin, Cuba, December 31, 1904, and March 

 7, 1905. These Cuban specimens agree in having black palpi and 

 blackish cal3^pters. Two specimens are from the Canadian National 

 Collection — one, British Guiana; one, Tropical Research Station of 

 the New York Zoological Society, Kartabo, British Guiana. From 

 the Hawaiian Sugar Planters' Experiment Station were received two 

 specimens from Blairmont, British Guiana, and one from Mera, 

 Ecuador, all collected by F. X. Williams. In addition to the mate- 

 rial cited, the National Museum has 18 specimens with the following 

 data: Three from San Antonio, Tex. (Crawford); one, Brewster 

 County, Tex. (Mitchell and Cushman); one from Rio Piedras, P. R.; 

 one from Higuito, San Mateo, Costa Rica (Schild) ; one, Puerto Bar- 

 rios, Guatemala (Deam); one, Culebra, Canal Zone; two, Jamaica, 

 "reared from hawk moth pupa"; and three specimens collected 

 in Bolivia by Dr. W. M. Mann while a member of the Mulford Bio- 

 logical Exploration. One of the last lot is from Rurrenabaque, Beni; 

 one from Cavinas, Beni; the third from Rio I von ; one from Sapucay, 

 Paraguay. Also 10 specimens from Sullana and Piura, Peru (Town- 

 send), types of Belvosia piurana Townsend. Three specimens from 



