208 



NEW YORK STATE MUSEUM 



Rhizomyia hirta Felt 

 191 1 Felt, E. P. Econ. Ent. Jour., 4:478 



This species was reared August 17, 1907 from a jar contain- 

 ing numerous reddish, blisterlike leaf mines on Crataegus col- 

 lected at Bath, N. Y., 

 July 9. This gall is pre- 

 sumably made by L a s i- 

 optera excavata 

 though this habit is ab- 

 normal for the genus. 

 The light fuscous yel- 

 lowish female may be 

 distinguished by the fifth 

 antennal segment having 

 a length two and one- 

 half times its diameter 

 and by the broadly ovate 

 lobes of the ovipositor. 



Larva. Length 2 mm, rather stout, pale yellowish. Head rather 

 broad ; antennae short, stout ; breastbone slightly expanded apically, 

 obtusely bidentate, subobsolete posteriorly. Skin smooth, posterior 

 extremity broadly rounded, with sublateral, irregular groups of 

 papillae. The larva is doubtfully referred to this species. 



Diarthronomyia arte- 



a male palpus, b side view of 



claw (enlarged, original) 



Ctenodactylomyia Felt, MS 

 This peculiar genus is easily distinguished from Rhizomyia by 

 the larger number of antennal segments and, in particular, by the 

 pectinate claws. The one known species, C . w a t s o n i Felt, MS 

 was reared from circular blister-like leaf galls on Coccolobis 

 f 1 o r i dan a . 



Diarthronomyia Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 339 



1910 Rtibsaamen, E. H. Zeitschr. Wissenschaftl. Insektenbiol, 15:337 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:45 



This genus presents a general resemblance to Rhopalomyia in its 

 biarticulate palpi and the great similarity in the structure of the 

 male genitalia. The minutely unidentate claws associate it with 

 Rhabdophaga and its allies. The type species isD. artemisiae 

 Felt. 



