CURCULIONID 4&—CURCULIONIN 43—CRYPTORHYNCHINI. 125 
RuysostERNUM LONGIROSTRE. 
Pl. v1, Fig. 20. 
Head almost concealed within the prothorax, densely and by no means 
finely punctate ; the eye moderately large, transversely oval; beak longi- 
tudinally striate, slender, and equal, gently arcuate in apical half, beyond 
strongly arcuate, nearly as long as the elytra, and where folded against 
the breast reaching the end of the metasternum. Prothorax rather more 
than one-half as high again as long, tapering with a full and uniform 
curve from the base, at apex as high only as long; surface uniform, 
densely and coarsely punctate, the puncta so disposed and confluent as 
to form deep sinuate or vermiculate longitudinal strigee, clothed also with 
short stout hairs. Under surface punctate, but much more coarsely and 
heavily on the thoracic than on the abdominal segments. Klytra sharply 
and deeply punctato-striate, the puncta more or less longitudinal; inter- 
spaces flat, faintly punctulate, and clothed with hairs like the thorax; tibive 
rather stout and slightly arcuate. 
Length, excluding rostrum, 5°8""; rostrum, 3°3™"; height of body, 
ae 
Florissant, Colorado. Three specimens, Nos. 3836, 7516, 8691. 
RuHyYSOStERNUM AETERNABILE. 
PL vag Pies 19. 
Head much as in the preceding species; the eyes mostly concealed by 
the postocular lobes; beak somewhat striate longitudinally, moderately 
slender and equal, somewhat and equally arcuate throughout, longer than 
head and prothorax together, and when folded against the breast reaching 
the end of the mesosternum. Prothorax apparently about half as high again 
as long, tapering as in the other species, at apex rather higher than long; 
the surface irregularly punctate, the puncta confluent, so as to form waver- 
ing longitudinal strigze, differing from the preceding species mainly in the 
more perfect confluence of the punctures and the sharpness of the interven- 
ing ridges. Under surface precisely as in R. longirostre.  Elytra not very 
deeply striate, but the strize with deep circular puncta, usually separated 
by fully their own diameter. 
