HEMIRHOPALUM. 651 
HEMIRHOPALUM, gen. nov. 
Antenne clava biarticulata, laxa. Prothorax subtus utrinque ad antennarum receptionem late et profunde 
sed minus argute impressus. 
This genus must be placed between Hadrotoma and Crypturhopalum. It agrees with 
the latter in most of its characters, but the sides of the thorax beneath have a large 
impression which is shallow behind instead of a depression that exactly fits the club of 
the antenne: this impression in front is broadly open. The ocellus is absent, but its 
position is indicated by a slight difference of the surface. ‘lhe antenne differ from 
those of Cryptorhopalum by having a large, but ordinary, laxly-jointed club of two 
joints. The form is oblong, the base of the thorax being less produced over the 
scutellum, and the surface much less pubescent than is usual in Cryptorhopalum. The 
species composing the genus appear to be all of the greatest rarity. 
1. Hemirhopalum clythreforme, sp. n. 
Oblongum, nigerrimum, nitidum, fere glabrum, antennis tarsisque sordide testaceis ; subtiliter punctatum, 
Long. 4 millim. 
Hab. Guatemata, Chiacam in Vera Paz (Champion). 
Antenne with the first joint of the club rather larger than the second. ‘Thorax 
strongly transverse, all the angles rounded, the base closely applied to the elytra, the 
sides very densely punctured, the disc more sparingly punctured and shining. Elytra 
finely and sparingly punctate. Ventral segments with an extremely dense punctuation. 
One specimen, probably a female. 
2. Hemirhopalum bicolor, sp. n. 
Oblongum, nigrum, nitidum; elytris lete rufis, parte apicali nigra; antennis testaceis, clava obscura; pedibus 
piceis, tarsis rufis ; subtiliter punctatum. 
Long. 43 millim. 
_ fab. Nicaracua, Chontales (Janson). 
Very closely allied to H. clythreforme, but readily distinguished by the bright red 
colour of the greater part of the elytra. The two joints of the antennal club are 
infuscate and just about equal in size. The punctuation on the thorax is fine, dense 
at the sides, more sparing but definite on the disc, and an excessively minute setosity 
is present. The elytra are bright orange-red, but broadly black at the tip, and there is 
also a very limited blackening on each side of the scutellum ; they have a very fine, 
but not scanty, punctuation, and no setosity. One specimen, probably a female, the 
last ventral plate being deeply transversely depressed. 
4O* 2 
