1986] Wiggins & Richardson — Onocosmoecus 189 
NHA N. H. Anderson, Department of Entomology, Oregon State 
University, Corvallis 
Oswood M. W. Oswood, Division of Life Sciences, University of 
Alaska, Fairbanks 
SDS S. D. Smith, Central Washington University, Ellensburg 
UA Strickland Museum, University of Alberta, Edmonton 
UBC Spencer Entomological Museum, University of British 
Columbia 
USNM National Museum of Natural History, Smithsonian Insti- 
tution, Washington, D.C. 
Vienna Naturhistorisches Museum, Vienna 
Z.I. USSR Zoological Institute, Academy of Sciences, Leningrad 
Genus Onocosmoecus Banks 
Dicosmoecus (Onocosmoecus) Banks 1943, p. 357; type-species by original designa- 
tion D. (O.) tristis Banks 1900. 
Onocosmoecus: Schmid 1955, p. 37. 
Onocosmoecus: Flint 1960, p. 19. 
Onocosmoecus: Wiggins 1977, p. 268. 
Onocosmoecus: Schmid 1980, p. 83. 
Originally recognized as a subgenus of Dicosmoecus (Banks 1943), 
Onocosmoecus was later elevated to full generic status by Schmid 
(1955) on the basis of characters of adults. Larval characters added 
to the generic diagnosis by Flint (1960) were augmented by Wiggins 
(1977). 
Description. Adults (Fig. 1) over-all light to medium brown 
colour, legs uniformly light brown; fore wings yellow-brown with 
variable markings, corneous spots in cells R4 and M variably pig- 
mented from dark brown to colourless, variable darkish pigmented 
areas around these spots and along apical and costal margins, rang- 
ing from complete absence to the condition where most of the wing 
is medium brown; these corneous points and surrounding pig- 
mented areas sometimes show a range of expression in a series from 
a single locality; hind wings paler and without markings. Venation 
similar to Dicosmoecus except discoidal cell of forewing not more 
than three times longer than basal radial sector (petiole). Length of 
fore wing: male 14.5-22 mm; female 15-23 mm. Tibial spurs 1, 3, 4. 
Head and thorax with sparse brownish and pale setae; setal warts 
approximately same colour as surrounding cuticle; pleural setal 
