BRUES: PHORIDAE OF GRENADA. 501 



Named for Dr. G. M. Allen, my companion in Grenada on the trip 

 when the specimen was collected. 



Since this was written I have seen additional specimens from Falls 

 Church, Va., collected by Mr. Nathan Banks. 



This species resembles D. incisuralis and D. venusia in the presence 

 of pale color on the body, but is more closely similar structurally to 

 D. concinna and its relatives except in the bare hind tibiae. It is 

 related to B. scfificra Malloch, but is without setulae on the hind tibiae, 

 has shorter costal cilia and paler halteres. 



The species of Dohrniphora known from North and Central America 

 may be distinguished by the following key: — 



1. Front tibiae with a serial row of four or five small, erect setae 



of subequal size; no bristle on prothorax just above spiracle . . 2. 



Front tibiae with one bristle at basal third and without additional 



setulae, prothorax with a bristle just above the spiracle; meso- 



pleura entirely bare 5. 



2. Head tibiae without any setulae 3. 



Hind tibiae Avith four or five serially arranged setulae on outer 



side D. incisuralis Loew. 



3. Black; legs brown, front pair varied with yellowish. 



D. knabi Malloch. 



Thorax yellow, at most with the dorsum darker, hind femora 



of male with a small patch of bristles on inner side near base . 4. 



4. Antennae not enlarged, of normal size...!), rcnusia Coquilett. 

 Antennae enlarged in both sexes; those of male pyriform. 



D. dispar Enderlein. 



5. Hind tibiae with some minute setulae on inner, outer, or on both 



sides : palpi and legs usually black 6. 



Hind tibiae without setulae before apex; palpi and legs yellowish 

 brown T). alleni Brues. 



6. Hind tibiae with setulae only on oiiter side; male antennae not 



noticeal)ly enlarged 7. 



Hind tibiae Avith a series of setulae on inner side as well as on 



outer; male antennae much enlarged. . . crassicornis Meigen. 

 Hind tibiae wath a series of short setulae inside the seam; legs 



pale P. seiigcra Malloch. 



7. Front quadrate; postantennal bristles below the next row by 



more than half the distance separating this row from the upper 

 row; halteres black; sixth segment of male strongly bristly. 



Z). cimhicis Aldrich. 

 Front distinctly wider than long; postantennal bristles below 



