278 Journal New York Entomological Society. t Vo1 - xxvu. 



tured in the open and characterized except that in the case of gall- 

 making species, it is frequently easier to identify the insect through 

 its work and there is no gainsaying the desirability of associating an 

 insect with its gall. 



The Adirondack midge fauna is a rich one and still far from being 

 thoroughly explored, though we probably know most of the genera 

 occurring in that section. The following species, in addition to the 

 new forms described below, were taken by Mr. Notman at Keene 

 Valley in late August and early September as follows : 



Winnertzia pectinata Felt, Aug. 27. Lobodiplosis acerina Felt, Aug. 30. 



Asynapta saliciperda Felt, Sept. 4. Feltiella emarginata Felt, Sept. 9. 



Camptomyia estiva Felt, Aug. 28. Karschomyia viburni Felt, Aug. 26. 



Dirhiza canadensis Felt, Aug. 14. Mycodiplosis Carolina Felt, Aug. 29. 



D. hamata Felt, Aug. 7. M. cyanoccoci Felt, Sept. 4. 



D. multiarticulata Felt, Aug. 29. M. variabilis Felt, Sept. 4. 

 Aphidoletes recurvata Felt, Sept. 15. 



Tritozyga borealis new species. 



A series of this interesting species was taken in early September, 

 the 10th to the 15th, 1917, by Mr. Howard Notman, at Keene Valley. 

 There are structural and colorational characters which appear to 

 separate this form from earlier characterized species, namely T. 

 sackeni Felt and T. fenestra Felt. Both sexes were captured, though 

 nothing appears to be known concerning the life history of the species. 



Male. — Length 1 mm. Antennae very short, dark brown, composed of nine 

 segments, the second somewhat swollen, subglobose, the third with a length 

 about half its diameter, the fourth with a length one half greater than its 

 diameter, terminal segment compound, tapering and with a length about z z A 

 times its diameter. Wings with the venation of T. sackeni. Claws moderately 

 long, slender, curved, the pulvilli as long as the claws. Genitalia ; basal clasp 

 segment moderately long, stout, terminal clasp segment stout and with a length 

 about 2y 2 times its diameter. 



Female. — Length 1 mm. Antennae short, dark brown, with 11 or 12 seg- 

 ments, the terminal long, tapering and with a length 2 l / 2 to 3 times its diam- 

 eter. Palpi ; first segment moderately long, pyriform, the second shorter, with 

 a length about twice its diameter, the third more than twice the length of the 

 second and somewhat dilated. Mesonotum shining dark brown. Scutellum 

 dark reddish brown. Postscutellum a little darker. Abdomen yellowish brown 

 or reddish brown. Wings hyaHne, iridescent. Halteres reddish brown. Legs 

 mostly fuscous yellowish. Terminal lobes of ovipositor triarticulate, the last 

 segment orbicular. Type Cecid. 1699. 



