437 



tarsi nearly bare ; the whole of the middle and hind legs quite hairy. 

 Fore metatarsus about one sixth longer than its tibia; the second 

 tarsal joint shorter than the third. The wings narrow and long, hya- 

 line with very slight yellow tinge; the costa, radius. R-M crossvein 

 and the basal half of the media testaceous, the other veins hyaline; 

 . . . . Halteres yellowish. 



Female. — "Basal half of antennae yellowish, fore tarsi bare. 

 Readily distinguished from related species by its short second tarsal 

 joint." — Johaunscn. 



Illinois locality, Chicago, May, 1899. 



The above description and record are from Johannsen's paper in 

 Bulletin 86 of the New York State Museum, 1905, page 212. 



I have not seen the species, which was originally described from 

 Europe and has not been recorded from North America except by 

 Johannsen. 



Early stages undescribed. 



17. Chironomus quadripunctatus, n. sp. 



Male. — Reddish brown, slightly shining. Head, including the 

 scape and basal flagellar joint of antennae, reddish, the remainder of 

 flagellum and the palpi fuscous. Vittse very slightly darker than re- 

 mainder of mesonotum ; scutellum concolorous with mesonotum, 

 pleurae and postnotum brownish. Abdomen deep brown, the segments 

 with narrow, posterior marginal pale bands. Legs and halteres yel- 

 low. Wings clear, veins pale yellow; cross vein not infuscated. An- 

 tennal plumes brown, body hairs yellow. 



Frons without distinguishable tubercles; antepenultimate joint of 

 palpi distinctly thicker than penultimate and slightly longer, ultimate 

 joint slender and distinctly longer than penultimate (PI. XXXII, Fig. 

 3). Mesonotum with but slight pruinescence on areas between the 

 vittse. Abdomen with four small, oval shining spotlike areas in a 

 square near posterior margin on dorsal surfaces of segments 2-6; 

 hypopygium much like that of decorus, the apical portion of lateral 

 arm rather thick apically and about equal in length to basal portion. 

 Fore tarsus with long hairs on posterior surface, basal joint barely 

 longer than tibia (75: 70). Cross vein slightly before wind-middle; 

 cubitus forking at wing-middle. 



Length, nearly 9 mm. 



Type localitv. Lake Delavan. Wis., September 7, 1892 (C. A. 

 Hart). 



Early stages unknown. 



