190 RHYNCHOPHORA. 
@. Rostrum short and stout, sulcate and thickened at the middle beneath ; 
tarsal claws free 1. 064 wee we Se ee a ee oes Species 11. 
e'. Elytra with interstices 7 and 9 narrowly costate ; prothorax with a 
setigerous hump; tarsal claws free. . . . + + + > ss. + mepecies Ie. 
f'. Elytra with interstices 3, 7, and 9 narrowly costate near th base, the 
humeri swollen ; prothorax conical ; tarsal claws free. . - + + + + Species 13. 
- g'. Elytra with interstices 7 and 9 faintly costate, the others flat, the humeri 
| subangularly dilated ; tarsal claws contiguous at base. . - + + + + Species 14. 
h'. Elytra with the interstices flat or feebly convex, the humeri obtuse ; 
. tarsal claws contiguous at base . . . ee ee ee et Species 15-18. 
b. Prosternal sulcus shallow or wanting ; prothorax very feebly sinuate at the 
base; anterior coxe contiguous; tarsal claws very small, free or sub- 
connate at base: species small, more or less variegate or maculate with 
ochreous, whitish, or pure white scales, [Cyrionyx, Faust.] 
i‘, Elytra with the interstices very sharply costate from near the base, the 
humeri rather prominent . . . . « « = + . . . « Species 19, 20, 
j'. Elytra with the inner interstices moderately costate fr om near + the base . Species 21. 
k'. Elytra elongate-triangular, with the dorsal interstices smooth and flat. Species 22. 
I‘. Elytra shorter, with the interstices flat or convex, closely punctulate or 
rugulose. 
e*. Prothorax and elytra with _ or lines of coarser, ochreous or 
white scales. . 2. 2. . s . : Species 23-51. 
f’. Prothorax and elytra mottled with. a dense clothing ‘of light ‘and dark 
scales, the scales on the elytraoval . . . . . . 6 « © « + « Species 32-34. 
1. Cyrionyx decemcostatus, sp.n. (Tab. XI. figg. 10, 10@.) 
Subrhomboidal, nigro-piceous or black, ‘the antenne, rostrum, tibie, and tarsi reddish or ferruginous ; 
variegated with a rather dense clothing of small, narrow, fulvous (or ochreous) and white scales, the 
white scales on the prothorax clustered into a narrow curved stripe on each side of the disc and those on 
the elytra into small scattered spots, which are here and there transversely confluent, the elytra also 
with a black patch at about the middle of the disc and a transverse black fascia near the apex; the 
vestiture of the under surface and legs sparse, fulvous and white intermixed. Rostrum stout, strongly 
arcuate, about as long as the head and prothorax, thickly punctate, a little smoother in the 9, the 
antenne inserted beyond the middle. Prothorax transverse, somewhat gibbous, rounded at the sides 
anteriorly, constricted and much narrowed in front, the short anterior portion tubulate; densely, finely 
punctate, and also carinate. Elytra broad at the base, triangular, with obtuse, projecting humeri; 
punctate-striate, the punctures oblong in shape, the interstices densely rugulose, 2, 3, 5, 7, and 9 
sharply costate, the ridges on 2, 3, and 5 more or less interrupted and not reaching the base. Beneath 
rather sparsely puuctate ; prosternum sulcate ; ventral segment 1 broadly depressed down the middle in 
the ¢. Femora each with a small tooth. -Tarsal.claws long, free. 
Length 43-5, breadth 24-23 millim. (¢ 2.) 
Hab. Mexico, Toxpam in Vera Cruz (Sa//é). 
Five specimens. Of the same size as C. octocostatus, but with a much shorter and 
stouter rostrum, the prothorax somewhat gibbous (the median carina arcuate, when. 
viewed in profile), the elytral coste more numerous (those on the disc interrupted), 
the humeri more prominent, the femora feebly dentate, the tarsal claws free. 
