MAY FLIES AND MIDGES OP NEAV YORK 221 



bare. Wings white with a slight milky tinge; veins colorless, in- 

 cluding the crossvein; venation as tigured. Halteres white, some- 

 times with a slight greenish tinge. In an occasional specimen the 

 middle section of each fore femur is brownish. 



Female. Like the male, excepting that the abdomen is black or 

 deep fuscous, dull; in well] (reserved specimens the posterior mar- 

 gins slightly cinereous; hairs pale. The flagella of the antennae 

 and sometimes the palpi also yellowish. In both sexes the fore 

 metatarsus is about one third longer than its tibia. One bred 

 specimen and a number of cajitured ones from Ithaca, N. Y.; also 

 some from New Jersey. 



33. Chironomus aberrans n. sp. 



Female. Resemjbles C. fallax n. sp. but is paler. Length 

 3.5 mm. Head, including antennae, wholly yellow, palpi pale fus- 

 cous. Dorsum of the thorax and scutellum yellowish, the three 

 dorsal stripes, pectus and a mark on the pleura, brownish ; meta- 

 notum dark brown. Abdomen fuscous, the first two and the 

 basal part of the third greenish or yellowish ; posterior margins 

 of the other segments indistinctly paler fuscous; hairs pale. 

 Coxae, the knees, the tips of the middle and hind tibiae and of the 

 tarsal joints brown; the apical half of front femora, basal half 

 and the tips of the front tibiae, and the tips of the fore tarsal 

 joints dark brown. ^\'ings hyaline, with a milky tinge; the veins, 

 including the crossvein, yellow; venation as shown on pl.28, fig.17. 

 Halteres white. The fore metatarsus is about one fifth longer 

 than its tibia. 



Male. Like the female but differs in having the first four or five 

 abdominal segments, yellowish. Ithaca, N. Y., Pennsylvania, 

 Washington State, New Jersey. 



34. Chironomus lugubris W^illiston 

 1896 Chironomus Williston. Trans. Ent. Soc. Lond. p.274 



Male. Similar to C . 1 o n g i m a n u s (No. 51) , but differs 

 in lacking the ibrown stri])es of the mesonotum, which is uni- 

 formly light yellow, in the abdomen being uniformly brown, and 

 in the femora being wholly light yellow. Lengi;h 3-4 mm. Willis- 

 ton, loc. eit. Fore metatarsus about 1^/4 times as long as its tibia. 

 St Vincent Island, West Indies. 



35. Chironomus fumidus n. sp. 

 (ri.2s, fig. IS) 

 Male. Fuscous; length 2.5 to 3 mm. Head with palpi, pro- 

 boscis, and antennae pale fuscous; the basal joint of the last, 

 brown, the second joint yellowish, the hairs pale fuscous. Dorsum 



