REPORT OF THE STATE ENTOMOLOGIST I907 



387 



HORMOMYIA H. Lw. 



The species included in this genus at the present time rep- 

 resent two rather distinct types. The more 

 typical form is large and heavy-bodied, 

 with the mesonotum greatly produced 

 over the head. The wings are long, nar- 

 row, and the males of this division have 

 14-26 binodose antennal segments, the 

 circumfili being short, the loops rarely 

 having a length greater than the dis- 

 tance separating the stems. Another type 

 provisionally referred to this genus, is 

 most easily recognized by the short wings, 

 broadly rounded posteriorly and having 

 a width about %. the length. These 

 species are rather small and the males 

 have the short, stout circumfili charac- 

 teristic of the larger forms. American 

 representatives of these smaller forms, so ^^s. 42 h o r m o my i a 



'ericana relt, i2than 



far as known, breed exclusively in hickory 

 leaf galls. 



Key to species 



. a Wings long, usually with a length more than twice the width [pi. Z7y %■ 2] 

 h Antennae composed of more than 20 segments 

 c Palpi uniarticulat'e 



d Antennae with 25 segments ; abdomen yellowish, male 



americana Felt, C. 91 

 cc Palpi biarticulate 



d Antennae with 27 segments ; abdomen yellowish, with the Sth, 

 6th and 7th segment's dull orange; ventral plate long, broad, 

 broadly rounded distally, male, .p a 1 u s tr i s Felt, C. 1205 

 dd Antennae with 26 segments ; abdomen uniformly fuscous yel- 

 lowish ; ventral plate long, broad, deeply and triangularly 



emarginate, male needhami Felt, C. . 788 



hh Antennae with less than 20 segments 

 c Antennae composed of 18 segments 



d Abdomen dark brown, the 3d and 4th segments margined 



posteriorly with yellow ; palpi biarticulate, female 



atlant'ica n. sp., C. 815 

 cc Antennae composed of 15 segments 



d Abdomen dark brown, the Sth segment mostly yellowish; 

 palpi biarticulate; ventral plate long, spatulate, truncate 



apically, male consobrina n. sp., C. 1204 



ccc Antennae composed of 14 segments 



a m- 

 antennal 

 segment of male, much en- 

 larged. (Original) 



