CURCULIONIDA—CURCULIONINA—ANTHONOMINI. jw) 
smaller than the width of the very slender, gently arcuate, equal beak, which 
is aslong as the head and prothorax together. Prothorax tapering from the 
base, more than half as high again as long, coarsely and uniformly punc- 
tate. Elytra punctato-striate with feebly punctate interspaces. 
Length, excluding beak, 3°75"; beak, 1:25""; height at thorax, 1:2™"; 
at middle of abdomen, 2™". 
Florissant, Colorado. Two specimens, Nos. 1416, 8637. 
ANTHONOMUS CONCUSSUS 
Pl. v, Figs. 4, 13. 
Body moderately stout, somewhat broader in middle of abdomen than 
elsewhere, the elytra moderately arched. Head rather small, about twice 
as broad as long, finely punctulate, especially above; eye small, circular, 
narrower than the rather slender, equal, gently arcuate beak, which is barely 
shorter than the head and prothorax together. Prothorax coarsely and uni- 
formly punctate, tapering from the base, about half as high again as long, 
with full outline. Under surface very coarsely and distantly punctate. 
Elytra uearly two and a half times as long as broad, rather heavily punctato- 
striate, the interspaces punctate. 
Length, excluding rostrum, 4:25-5:25"; rostrum, 11-14"; height at 
prothorax, 1-4-1:75""; at middle of elytra, 2-2°5™. 
This species appears to vary considerably in size, and I have given 
measurements of extreme individuals. 
Florissant, Colorado. Nine specimens, Nos. 5512, 6375, 7685, 7695, 
8425, 8732, 9629, 11297, 14163. 
ANTHONOMUS ARCTUS. 
Pl. v, Fig. 16. 
Body stout, much broader in middle of abdomen than elsewhere, the 
elytra having a rapid posterior slope. Head tapering, subconical, nearly as 
long as wide, the surface distinctly though finely punctate, but transversely 
and very finely striate beneath; eye pretty small, circular, about the diameter 
of the very slender, almost or quite straight, and equal beak, which is much 
8 
MON XXI 
