Genus Culicada. 357 



well below the middle, apex with one long and some smaller 

 spines, and an articulating segment ; labial plate triangular, 

 15-17 teeth on each side of the apex ; lateral combs on eighth 

 segment large, 25-30 scales in each, each scale elongated, with 

 moderate terminal spine and smaller lateral ones ; pecten of 

 siphon composed of 16-20 spines in each row, each spine with 

 one or two teeth near the base (J. B. Smith). 



The pale scales at the sides of the mesothorax of the adult 

 vary, in some they are of a more golden than creamy colour : 

 this is especially noticeable in a specimen examined from 

 Alaska. 



The thoracic adornment at once separates it from others of 

 this genus. 



Culicada trichura. Dyar (1904). 

 Culex iridiums. Dyar. 



N. Y. Ent. Soc. Journ. 12, p. 169 (1904), Dyar. 



Head brown with silvery-grey scales ; proboscis and palpi 

 deep brown ; thorax brown with golden-brown scales in the 

 middle, silvery-grey at the sides forming two rather obscure 

 lateral lines. Abdomen deep brown, basally banded white. 

 Legs deep brown, unbanded, femora speckled with yellow and 

 pale ventrally, and at the base. Fork-cells of wings very short. 



9 . Head deep brown with rather dense, large narrow- 

 curved silvery -grey scales, a few ochreous upright forked scales 

 in the middle, and dark ones at the sides ; lateral scales 

 spatulate, grey ; proboscis and palpi deep blackish-brown ; 

 antennae very dark, basal segment deep testaceous with a few 

 pale scales. 



Thorax deep brown, with scattered rather irregular golden 

 brown scales in the middle, rather broader silvery -grey ones at 

 the sides, forming broad lateral lines, and a few silvery-grey ones 

 in front ; chaetae deep brown ; scutellum brown, with large 

 narrow-curved pale scales and brown border-bristles with a 

 golden tinge in some lights ; metanotum deep brown ; pleurae 

 deep ochreous with numerous flat white scales. 



Abdomen deep brown with basal white bands and pale brown 

 border-bristles. 



Legs deep brown, with a violet tinge in some lights, femora 

 mottled with yellow scales, pale at' the base and ventrally ; femora, 



