AET. 9 FLIES OF THE GENUS STYLOGASTBR ALDRICH 21 



longer than usual, the costal segment between its apex and that of the 

 third vein about as long as the hind erossvein. 



Length, 8.2 mm. 



The proboscis in this specimen extends directly forward and has a 

 length of 9 mm. 



Described from one male, collected at Bartica, British Guiana, 

 and received from C. W. Johnson. Type in Museum of Comparative 

 Zoology. 



STYLOGASTER APICALIS, new species 



Male. — Frontal triangle rather large, extending somewhat more 

 than halfway to the lunule; front brown from the lunule upward, 

 almost black at vertex. Antennae pale at base, third joint red with 

 dark upper border and more widely around apex. Mesonotum black, 

 humeri white, a broad brown stripe extending down the mesopleura, 

 ending at the sternopleura. Humeral 1 ; notopleural 2 ; supraalar 1. 



Abdomen mostly blackish, first segment dark above except extreme 

 base, the lateral bristles black and arising from a brown or blackish 

 spot; second segment with basal fourth yellowish, which becomes 

 wider at the sides, lateral bristles black, in a single row; third, 

 fourth, and fifth segments mostly black with basal yellow band 

 narrowed in middle. 



Front and middle legs yellow, the tarsi slightly brownish apically ; 

 hind femora brown, the middle third a little lighter. Villous pile 

 of coxae, trochanters, and inner sides of femora almost entirely 

 absent. Hind tibiae brownish, the penultimate fifth a little paler; 

 hind tarsi entirely black. 



Wing slightly brownish, first posterior cell beyond its middle 

 about equalling in width the submarginal; last section of fifth vein 

 equal to one-half the hind erossvein. Tip of second vein nearer 

 base than anterior end of hind erossvein. 



Female. — Ovipositor slightly longer than the remainder of the 

 abdomen, short basal segment yellow, second black, the apical seg- 

 ment white except on basal third, the tip becoming brown and the 

 appendages yellow. 



Length, male 4.8 mm., female 4 mm. to ovipositor, which is 

 2.3 mm. 



Described from 5 specimens: 2 males, including the type, from 

 Lombardia, Honduras (W. M. Mann) ; 2 females Barro Colorado 

 Island, Canal Zone (C. H. Curran) ; the fifth is also from Lomardia, 

 Honduras (W. M. Mann), but has lost the abdomen and the sex is 

 uncertain. 



ry/?e.— Male, Cat. No. 43029, U.S.N.M. 



