INSECUTOR INSCITI^ MENSTRUUS 77 



Face, front, cheeks, and occiput silvery, the parafrontals 

 with a very faint tinge of brassy. Antennae and frontalia 

 wholly blackish. Palpi light fulvous. Thorax silvery, with 

 four black vittae, of which the outer ones are heavier and in- 

 terrupted. Abdomen largely fulvous, sometimes in male 

 wholly so except tergum of anal segment ; a more or less dis- 

 tinct median vitta of darker ; the vitta may spread out in black 

 on hind margin of second segment in male, and cover all of 

 third and anal segments, with silvery pollen on basal half of 

 intermediate segments and nearly all of anal segment, the 

 silvery dotted with black at origins of hairs. Female abdomen 

 with more black as a rule ; the base and sides of tergum more 

 or less broadly fulvous, the venter fulvous on basal half or so. 

 Legs blackish. Wings very lightly smoky. Tegulse whitish, 

 the hind scale of male lightly infuscate on posterior half. 



Holotype, Cat. No. 20309, U. S. Nat. Mus., male, Audubon 

 Park, Louisiana. 



Schizocerophaga, new genus. 



Holotype, Schizocerophaga leibyi, new species. 



Differs from Doryphorophaga as follows : Male without pro- 

 clinate orbitals. Eyes bare in both sexes. Female front nearly 

 twice as long as wide. Ocellar bristles stronger. Parafacials 

 and parafrontals not so wide. Facialia ciliate on lower one- 

 third or so. No discal macrochaetse on intermediate abdominal 

 segments in either sex. Apical cell widely to narrowly open a 

 little before tip of wing. Tegulae not enlarged. 



From Hylotomomyia it differs by the parafacials being nar- 

 row and not hairy and the discals absent as above stated. From 

 Tachinophyto it differs by the male being without proclinate 

 orbitals, the front narrower, etc. 



Schizocerophaga leibyi, new species. 



Length of body, 5 to 7 mm. ; of wing, 3.5 to 4.75 mm. Two 

 males and three females, Raleigh, North Carolina, reared by 

 Mr. R. W. Leiby from pupae of Schisocerus privatus Norton, 

 July 31, 1915 (Expt. No. 61-6). 



