1986] 
Wiggins & Richardson — Onocosmoecus 
193 
edge of femora: profemur 1-3, mesofemur 4-11, metafemur 6-13; 
tibiae with a single pair of stout spur-like setae; trochanteral brush 
present on all legs, density variable. Femora flattened and com- 
pressed, ventral edges blade-like. Abdominal segment VI with 1-4 
setae posterodorsally on each side of median line; VII with 1-5, 
usually 4 setae in this position; VIII with dorsal transverse row of 
approximately 16-24 setae; dorsal sclerite on segment IX with 12-15 
setae; lateral abdominal gills present on segments IV and V; abdom- 
inal gills: dorsal, II 1-2, 3-4; III 3, 3-4; IV 3, 3-4; V 2-3, 2-3; VI 2-3, 
2-3; VII 2, 2-3; VIII 0-2; lateral, II 0, 2-3; III 2-3, 2-3; IV 2-3, 2; V 
1- 2; ventral, II 2, 4; III 3, 4; IV 3, 3-4; V 2-3, 4; VI 2-3, 3-4; VII 2, 
2- 3. Length of larva up to 25 mm. 
Case (Fig. 9). Constructed of fragments of leaves, wood and 
bark, walls rather thin and flexible; length of case up to 27 mm. 
Pupa. Generally as in Dicosmoecus with dorsal hook plates on 
segments III-VII, dorsal sclerites on segment I with pronounced 
median notch, and setal tufts present on first two antennal seg- 
ments; dorsum of segment VIII with approximately 30 setae, dor- 
sum IX with approximately 14; anal processes slightly curved. 
Onocosmoecus unicolor (Banks) 
Anabolia unicolor Banks 1897, p. 27; holotype $, Washington, Mus. Comp. Zool. 
Harvard. 
Asynarchus tristis Banks 1900, p. 254; cotypes IS, 2$, Colorado, Mus. Comp. Zool. 
Harvard. New Synonymy. 
Dicosmoecus coloradensis Ulmer 1905, p. 64, figs. 14-16; cotypes 2 S, 1$, Colorado, 
Naturhistorisches Mus., Vienna. New Synonymy. 
Anabolia quadrinotatus Banks 1908 (Anabolia 4-notata), p. 62, fig. 14; holotype S, 
Newfoundland, Mus. Comp. Zool. Harvard. New Synonymy. 
Dicosmoecus flavus Martynov 1914, p. 253, cotypes 2£, Kamchatka, Zool. Inst., 
Leningrad. New Synonymy. 
Dicosmoecus (Onocosmoecus) occidentis Banks 1943, p. 362, figs. 104, 116, 124, 
125, 128, 132, 136; holotype S, Idaho, Mus. Comp. Zool. Harvard. New 
Synonymy. 
Dicosmoecus (Onocosmoecus) alascensis Banks 1943, p. 363, figs. 105, 123, 129; 
holotype (5, Alaska, Mus. Comp. Zool. Harvard. New Synonymy. 
In 1943 Banks reviewed the characters used to distinguish the four 
Nearctic species then assigned to D. (Onocosmoecus), and at the 
same time described two additional species, D. (O.) occidentis and 
D. (O.) alascensis. After studying more than 1000 adult specimens, 
