124 Journal New York Entomological Society. I^'o'- >^-^ii- 



Fig. 6. Hypopygium of Gonomyia (Leiponeura) recnrvata n. sp. Ventral 

 aspect ; a, pleural pieces ; b, dorsal apical appendage ; c, ventral apical append- 

 age ; d, intermediate apical apendage ; e, dorsal gonapophyse ; /, ventral gona- 

 pophyse ; g, penis-guard. 



Fig. 7. Hypopygium of G. (L.) calrerti n. sp. Dorsal aspect of the 

 pleurite. 



Fig. 8. Same as last. Lateral aspect of the end of the abdomen, a, pleu- 

 rites from the side; b, dorsal wall of the genital chamber; c, gonapophyse; 

 d, ventral arms. 



Fig. 9. Hypopygium of Molophilus orion n. sp. Ventral aspect of the 

 ventral apical appendage. 



Fig. 10. Thorax of Rhipidia (Coiorhipidia) punctipeunis n. sp. Lateral 

 aspect showing the conspicuous dorsal protuberance. 



DESCRIPTIONS OF GALL MIDGES. 



By E. p. Felt, 

 Albany N. Y. 



The following descriptions of species are mostly based upon a 

 remarkable collection made by Mr. C. P. Alexander in Fulton County, 

 N. Y. Mr. Alexander succeeded in taking both sexes of the striking 

 Didactylomyia longimana Felt, the female being previously unknown, 

 and also obtained a series of the peculiar Karschomyia vibiinii Felt, 

 the female of which had not been recognized before. 



Colpodia americana new species. 



This species is described from a male taken by Mr. C. P. Alexander 

 August 14, 1909, on the east shore of Woodworth's Lake in the 

 Adirondacks, altitude 1,550 feet. This form is related to C. trifolii 

 Felt. It is larger in size, differs in coloration and exhibits a marked 

 divergence in the structure of the genitalia. 



Male. — Length 1.2 mm. Antennse more than twice the length of the body, 

 sparsely haired, fuscous yellowish ; sixteen segments, the fifth with a stem 

 twice the length of the basal enlargement, which latter has a length one-half 

 greater than its diameter. Palpi ; first segment with a length about four times 

 its diameter, the second as long as the first, stouter, the third a little longer 

 than the second, the fourth one-half longer than the third, more slender. 

 Mesonotum light brownish yellow. Scutellum and postscutellum whitish yel- 

 low. Abdomen fuscous yellowish, the apex recurved dorsally. Haltercs and 



