196 RHYNCHOPHORA. 
streak on the fifth interstice towards the apex ; the vestiture of the under surface and legs ochraceous. 
Rostrum feebly arcuate, cylindrical, moderately stout, longer than the head and prothorax, rugulosely 
punctate at the sides towards the base, and for the rest almost smooth, the antenne inserted at the 
middle. Prothorax short, conical, constricted in front, closely, minutely punctate, with indications of 
a smooth median line. Elytra triangular, rapidly and obliquely narrowing from the base, the humeri 
swollen ; finely punctate-striate, the interstices rugulose, flat, 3, 7, and 9 narrowly costate at or near the 
base. Beneath closely punctate. Prosternal sulcus deep. Anterior cox narrowly separated. Femora 
sharply dentate. 
Length 21, breadth 13 millim. (2.) 
Hab. Panama, Volcan de Chiriqui 4000 feet (Champion). 
One specimen. Very like C. sguamans, but with the elytral vestiture finer, the 
elytra themselves obliquely narrowing from the swollen humeri, and with the interstices 
3, 7, and 9 finely costate at the base, the anterior coxe less approximate, the prosternal 
sulcus deep. 
14, Cyrionyx humeralis, sp.n. (Tab. XI. figg. 20, 204, ¢ .) 
Subrhomboidal, piceous, the antenne (and sometimes the rostrum also) ferruginous ; mottled above with a 
dense clothing of small, oval, fuscous and cinereous (or ochraceous) scales, the prothorax with two 
broad dark vitta (sometimes each divided into two spots) on the disc, the pallid scales on the elytra 
condensed into a short streak on the fifth interstice at its point of termination; the vestiture of the legs 
and under surface whitish or ochraceous. Rostrum moderately stout, feebly arcuate, long, fully reaching 
the apex of the metasternum in both sexes, striato-punctate in its basal half and sparsely punctate thence 
to the apex, a little smoother in the 9, the antenne inserted at about the middle. Prothorax transverse, 
constricted and much narrowed in front, the sides rapidly, arcuately converging from the base; densely, 
finely punctate. Elytra shining, triangular, rather convex, with dilated humeri, which are angular 
behind, the subapical callosities prominent ; finely punctate-striate, the interstices rugulose, broad, 
and almost flat, 7 and 9 sometimes with a faint carina running down from the shoulder. Beneath 
rather sparsely punctate. Prosternal sulcus deep, bare. Ventral segments 1 and 2 depressed down the 
middle, and 5 broadly foveate, in the d. Legs rather stout ; femora strongly dentate. 
Length 34-4, breadth 21-22 millim. (d 2.) 
Hab. Mexico, Playa Vicente (Sallé), Teapa (H. H. Smith); GUATEMALA, Teleman 
(Champion). 
Six specimens. Recognizable from its allies by the angularly projecting humeri, 
mottled elytra, and flat dorsal interstices. C. huwmeralis is the representative. of 
C. turbidus on the Atlantic slope. 
15. Cyrionyx turbidus, sp.n. (Tab. XI. figg. 21, 21a, 2.) 
Subovate, rather short, nigro-piceous or piceous; mottled above with a dense clothing of small, oval, fuscous 
and flayo-cinereous (or ochraceous) scales, the prothorax with two dark patches (sometimes united into a 
single vitta) on each side of the pallid median stripe, the pallid scales on the elytra condensed into 
a short streak on the fourth interstice below the base and another on the fifth at its point of termination, 
and the fuscous scales clustered into numerous spots; the vestiture of the under surface and legs 
ochraceous or whitish. Rostrum moderately stout, arcuate, long, about reaching the apex of the 
wuetasternum in the 9, in the ¢ striato-punctate in its basal half and sparsely punctate thence to the 
apex, in the @ smoother and sparsely punctate throughout, the antenne inserted near the middle, 
Prothorax transverse, rounded at the sides, constricted and much narrowed in front; densely, finely 
