454 



brown ; palpi brownish yellow. Mesonotum with gray or brown vittae, 

 the disc with faint whitish pruinescence ; sternopleura reddish except 

 on upper margin ; postnotum brown. Abdominal segments each with 

 the basal half blackish brown, the dark color usually extending poste- 

 riorly on median line, or with a broad brown band on basal half which 

 does not extend to the extreme base. Legs greenish yellow, knees, and 

 apices of tibice and of the tarsal joints narrowly brown. Wings as in 

 stiginatcrus (?). 



Frontal tubercles large; palpus as in Figure i, Plate XXXII. 

 Hypopygium as in Figure 13, Plate XXXIII ; lateral view as in Figure 

 13, Plate XXXI\'. Surface hairs on fore tarsi and mid and hind legs 

 shorter than in stiginatcnis (?) ; basal joint of fore tarsi slightly less 

 than one fourth longer than fore tibi?e (98:80). \>nation as in 

 stigniatcriis (?). 



Length, 8 mm. 



Type locality, Peoria, 111., October 22, 1914, at light (C. A. Hart). 

 Paratypes from Lake Lomalta, Texas, November 27, 1910 (C. A. 

 Hart) ; and from Katherine, Texas, December 3, 191 1 (C. A. Hart). 



Female and early stages unknown. 



The male of this species is readily separated from any other species 

 of the plumosus group by the form of the hypopygium. 



35. Chiroxomus paludus Johannsen 



Chironomus paJIidiis Johannsen, Bull. 86, X. Y. State Mus., 1905, p. 230. 



Male. — Pale green. Head green ; scape of antennae yellow, flagel- 

 lum greenish at base, the remainder fuscous, plumes brownish, paler at 

 apices; palpi brownish black. Thoracic vittae reddish yellow; pleurae 

 W'ith a longitudinal black streak on middle extending from anterior 

 margin midway to posterior margin ; sternopleura reddish ; postnotum 

 glossy black. Abdomen entirely pale green, rarely yellowish at apex. 

 Legs pale yellowish or greenish, knees, apices of tibiae, and apices uf 

 basal joint of fore tarsi narrowly blackened. Wings clear, veins yel- 

 low, the cross vein clear. Halteres yellow. 



Antenna slightly longer than head and thorax combined ; palpus 

 about twice as long as height of head ; eyes rather widely separated 

 above. Alesonotum much enlarged in front, obliterating the pronotum, 

 which is linear on the anterior surface of the mesonotum to the level 

 of the upper margin of head ; discal hairs of mesonotum and scutellum 

 not conspicuous. Abdomen slender, last 3 segments slightly widened ; 

 surface hairs soft and pale, not very long; hypopygium as in Figure 

 4, Plate XXXI\'. Legs slender; fore tarsi without long hairs, basal 



