628 LATHRIDIIDZ. 
traces of being formed by two confluent impressions. Elytra elongate, with a deep 
sutural stria, impunctate. Femora thick. 
I see no differences in the nine examples Mr. Champion found of this species. 
4. Holoparamecus constrictus, sp. n. 
Elongatus, in medio constrictus, rufo-piceus, antennis pedibusque testaceis, subpolitus, omnium minutissime 
punctulatus; oculis mediocribus, prothoracis marginem haud attingentibus; prothorace ante basin pro-— 
funde impresso ; elytris convexis, subinflatis. 
Long. 14 millim. 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 
Another very distinct species of the subgenus Ca/yptobium. ‘The antenne are slender, 
the ninth joint not transverse, though broader than the eighth; tenth joint large, 
subcyathiform, receiving the small terminal joint, the part of which that is seen is 
obliquely truncate and strongly transverse. ‘The eyes are coarsely facetted, but are 
small and do not touch the angles of the thorax. The thorax is rather long, convex, 
greatly narrowed behind, deeply foveolate at each hind angle, and with a transverse 
impression in front of the base. The elytra are slender, convex, much rounded at the 
sides and narrowed behind, polished, but with a scanty punctuation and an extremely 
minute setosity that is difficult to detect ; there is a well-marked sutural stria. One 
specimen. 
EVOLOCERA, gen. nov. 
Corpus -breviter ovale, fere glabrum. Antenne decem-articulate, clava biarticulata. Palpi breves, crassi. 
Oculi prominuli. Prosternum processu parvo, libero. Pedes breves. Metasternum breve. 
This insect may be placed between Cholovocera and Merophysia, from the former 
of which it differs in numerous details; the most important is, that the middle coxe 
are much less widely separated and the division between the metasternum and meso- 
sternum indistinct ; the prosternal process is small and narrow, strongly carinate, and 
is received in a minute cavity at the junction of the meso- and metasternum. ‘The 
structure is thus very different from that of Cholovocera and more similar to that of 
Merophysia. There are coxal lines on the first ventral segment, but none on the 
metasternum. 
The specimens have all been mounted in gum-tragacanth, and the structure of the 
tarsi cannot properly be made out. 
1. Evolocera championi, sp.n. (Tab. XIX. fig. 2.) 
Breviter ovalis, superne convexa, ferruginea, antennis pedibusque testaceis, minutissime punctata et setosa, 
nitida ; prothorace ad basin ipsam transversim impresso, impressione utrinque a plica brevi terminata. 
Long. 14 millim. 
Hab. Guatemata, San Juan in Vera Paz (Champion). 
