COLPARTHRUM. 67 
base of the head, and with a deep transverse impression (rarely effaced), on either side of which is a 
setiferous puncture, between them; head strongly and obliquely narrowed behind into a neck ; antennse 
variable—the apical joint comparatively short in both sexes, scarcely equalling 9'and 10 united, or very 
elongate in the male (C. foveiceps and C. vitticolle); prothorax strongly compressed and completely 
immarginate at the sides, and with a groove behind extending completely across; elytra subparallel 
towards the base, and with the sides converging from about the middle; anterior cox moderately 
exserted, the prosternum raised between them to the level of the cox; metasternal episterna (para- 
pleura) with a narrow deep groove along the inner edge, the groove turned abruptly outwards in front 
and continued along the anterior margin ; tibie not grooved on their outer edge, and with one or two 
spurs of variable size—in C. calcaratum and C. sulcicolle with one only (in C. decoratum and C. foveiceps 
they are short but distinct, in C. vitticolle indistinct) ; femora more or less clavate towards the apex. 
C. decoratum and C. calcaratum are obviously very closely allied, notwithstanding 
the difference in the shape of the last joint of the labial palpi and in the presence of a 
very long single spur to each of the tibie in C. calcaratum. The presence or absence 
of spurs to the tibiz cannot be treated as of generic value, unless accompanied by other 
differences of structure, and, moreover, they are often difficult to detect amongst the 
short bristly hairs clothing the apices of the tibie. The deep groove along the inner 
margin of the metasternal episterna is very sharply cut, and it is apparently a character 
of generic value. The five Central-American species here referred to Colparthrum all 
have a very deep transverse impression (rarely effaced) between the eyes. The femora 
are moderately clavate in C. decoratum and C. foveiceps, strongly so in C. calearatum, 
C. sulcicolle, and C. vitticolle. 
1. Apical joint of the labial palpi very deeply emarginate at the apex; tibial spurs 
short ; elytra not mucronate at the apex. 
a. Antenne with the apical joint short in both sexes ; elytra spotted. 
1. Colparthrum decoratum, (Tab. III. figg. 20, ¢ ; 20a, labium; 208, max- 
illa and maxillary palpus; 20 ¢, mandible.) 
Statira decorata, Makl. Act. Soc. Fenn. vii. p. 588°. 
Hab. Muxico!, Cordova (Sallé), Jalapa (Hége); Guatemana, Las Mercedes, Cerro 
Zunil, Zapote (Champion), Coban (Conradt). 
Var. The anterior yellowish-testaceous spot on the elytra smaller, not extending so far laterally, and more 
distant from the base, the ground-colour rather darker (varying from piceous- to reddish-brown) ; the 
punctures of the striz on the basal half of the elytra coarser, deeper, and more scattered. 
Hab. Nicaraava, Chontales (Belt); Panama, Volcan de Chiriqui 3000 feet 
(Champion). 
Many specimens of both the type and the variety. The latter, no doubt, represents 
a southern race of the same species; it is connected by intermediate forms. This 
species is more or less reddish-brown or castaneous in colour and shining, and of 
moderately elongate shape; the elytra each having a transverse flavo-testaceous band 
KK2 
