453 



33- Chironomus stigmaterus Say? 



Chironomiis stigmaterus Say, Jour. Acad. Nat. Sci. Phil., Vol. 3, 1823, p. 15. 



Male. — Yellow (probably greenish when alive). Head dull yel- 

 low ; antennae fuscous, becoming paler towards apex, the plumes yel- 

 lowish brown ; palpi brown. Mesonotum with reddish yellow vittse ; 

 lower half of sternopleura reddish ; postnotum reddish brown. Basal 

 four segments of abdomen slightly browned on dorsum and lateral 

 margins of basal half, the remaining segments grayish, all segments 

 with slight whitish pruinescence. Legs yellow, apices of tarsal joints 

 of all legs narrowly browned. Wings clear, veins yellow, cross vein 

 and small portion of connected veins brown. 



Frontal tubercles rather long and stout. Hypopygium identical 

 with that of ferrugineovittatiis. Fore tarsi from middle of basal 

 joint, and mid and hind tibiae and tarsi with very long hairs ; basal 

 joint of fore tarsi slightly more than a third longer than fore tibiae 

 (85:63). Third vein ends very slightly farther from apex of wing 

 than fourth does behind same ; cubitus forks directly below cross vein. 



Fanale. — Differs from the male in being darker in color, the vit- 

 tae brown, and the abdominal segments except the apices grayish. 



The leg proportions are as in the male, but the long hairs are ab- 

 sent. In other respects agrees with the male except in sexual charac- 

 ters. 



Length, 7.5-8 mm. 



Locality, Oak Creek, Lincoln, Nebraska, October 16, 1898 (C. A. 

 Hart). 



Early stages unknown. 



This species closely resembles ferrugineovittatus, differing princi- 

 pally in size, color, and proportionate lengths of fore metatarsus and 

 fore tibia. I have some doubt as to the identity of this species with 

 that described by Say, and that which was considered as Say's species 

 by Johannsen. The latter gives the length of the basal joint of the 

 fore tarsi as exceeding that of the fore tibiae by about one fifth, while 

 in my specimens it is considerably greater. The specimens Johannsen 

 had were from Kansas, Washington State, California, Wisconsin, 

 Idaho, New Jersey, and South Dakota. Say's original record gives 

 only United States. 



34. Chironomus crassicaudatus, n. sp. 



Male. — Yellowish green, opaque. Head yellow ; scape of antennae 

 and base of flagellum yellowish, the remainder fuscous, plumes pale 



