TAXONOMY OF MUSCOIDEAN FLIES — TOWNSEND 57 



A female specimen received from the Cotton Boll Weevil Labora- 

 tory (Hunter) was collected on an acorn of Quercus alba at Ruston,. 

 Louisiana, October 31, and was apparently ovipositing on a weevil 

 larva within. 



A female specimen from New Mexico (Santa Fe, Cockerell) has 

 a pair of small macrochaetae on anterior border of second and third 

 abdominal segments, and a submarginal posterior pair on third seg- 

 ment. It may be a distinct form. 



These forms are placed in Myiophasia tentatively, and may need 

 to be removed on further study. 



Genus Phasioclista Townsend 



The genus Phasioclista Townsend also has the eyes bare, but 

 the cheeks are almost or quite one-half eye height in width in 

 both sexes ; male claws long, all being distinctly longer than last 

 tarsal joint; female claws very short; arista bulbous at base, indis- 

 tinctly jointed; first and second abdominal segments without macro- 

 chaetae, apical cell closed or sometimes very narrowly open, hind 

 crossvein nearly straight. 



Myiophasia differs from Phasioclista in having a loosely set, 

 oblique, fringe-like row of bristly hairs on parafacials, in addition to 

 the shorter irregularly arranged hairs above them ; the cheeks are 

 not so wide, as above pointed out, a double costal spine is present, 

 and the antennae reach almost to insertion of vibrissse. 



Whether the specimens with apical cell open and closed represent 

 different forms of Phasioclista is still a question, but the fact is re- 

 corded in Psyche (June, 1893, p. 467) that specimens bred from dif- 

 ferent hosts differed in this character. A specimen bred from 

 Leucania unipuncta had the apical cell open, and another bred from 

 Sphowphorus parvulus had same closed. The radical difference 

 between a parasitic habit involving a lepidopterous larval host with 

 soft skin, and one affecting an adult coleopterous host, would easily 

 imply the distinctness of these forms. 



Phasioclista metallica Townsend. — Both sexes have perfectly bare 

 eyes. Female with more or less suggestion of pollen on mesoscutum 

 in front. No macrochaetae on first two abdominal segments. Male 

 with rows of hairs on parafacials, female practically without. 



Florida, Georgia. 



Genus Ennyomma Townsend 



Bnnyomma, at least in the male, has the eyes thickly pubes- 

 cent ; arista distinctly three-jointed, not so bulbous at base as in 

 Phasioclista; second abdominal segment with marginal macrochaetae; 



