208 NEW YORK STATE MUSEUM 



Female. Length .75 mm. Antsnnae extending to the middle of 

 the abdomen, sparsely haired, light brown; fourteen segments, the 

 fifth with a stem one-fifth the length of the cylindric basal enlarge- 

 ment, which latter has a length about three times its diameter; 

 terminal segment slightly reduced and apically with a rather short, 

 stout appendage. Palpi ; first segment v^dth a length twice its diam- 

 eter, the second one-half longer, the third as long as the second, 

 the fourth a little longer than the third. Face yellowi^. Mesono- 

 tum black. Scutellum and postscutellum reddish brown. Abdomen 

 reddish brown, the distal segment and ovipositor light yellowish, 

 the other segments margined posteriorly with dark brown. Costa 

 reddish brown, subcosta uniting therewith at the basal fourth, the 

 third vein joining the margin well beyond the apex. Halteres yel- 

 lowish or reddish transparent. Coxae and basal portion of femora 

 yellowish, distal portion of femora, tibiae and tarsi a variable straw 

 brown; claws slender, slightly curved, s'mple. Ovipositor short, the 

 lobes lanceolate, slender, coarsely setose. Type Cecid. 102. 



DYODIPLOSIS Rubs. 



1910 Rubsaamen, E. H. Zeitschr. Wissenschaft. Insektenbiol., 6:287 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:62 



1912 Rubsaamen, E. H. Zeitschr. Wissenschaft. Insektenbiol., 8:49 



1913 Kiefifer, J. J. Gen. Insect., fasc. 152 p. 205 



This genus, previously unrecognized in America, presents a general 

 resemblance to a typical Hormomyia. It may be distinguished by 

 the mesonotum not being produced over the head, the tri- or quadri- 

 articulate palpi, the moderately long circumfila, the female being 

 noteworthy because of the erect loops and the two connecting fiH, 

 the simple claws and rudimentary pulvilli, the short ovipositor, the 

 heavy genitalia with a broadly lobed dorsal plate and the broad, 

 truncate, ventral plate. Type Hormomyia aranariae 

 Rubs. 



Dyodiplosis davisi n. sp. 

 The male was taken in a trap lantern at Huguenot Park, Staten 

 Island, June 22, 1906. It appears to be most closely allied to this 

 genus though it differs somewhat from the typical form. Two 

 Indian species are known and as the generic type is European, this 

 would indicate a wide distribution for the genus or at least closely 

 allied forms. 



Male. Length 3.5 mm. Antennae probably longer than the body, 

 pale straw yellow, and presumably with fourteen segments. The 

 fifth with stems with a length one-half greater and a little greater 

 than their diameters, respectively; distal enlargement subcylindric, 

 with a length about twice its diameter; circumfila with short, mod- 

 erately thick loops. Palpi; first segment with a length over twice 



