160 LONGICORNIA. 
COSMOTOMA. 
Cosmotoma, Blanchard, Hist. des Insectes, ii. p. 155 (1845). 
Beitista, Thomson, Class. Long. p. 16 (1860). 
The true position of this genus, which differs so strikingly from its allied genera in 
the elegant tufts of hair which ornament the antenna, is evidently here, many parts of 
its structure having a close resemblance to those of Lophopwum scopiferum and barbi- 
scapum. The anterior acetabular sutures are tightly closed; but the forehead is more 
prolonged below the eyes than is usual in Acanthocinini. Four species are known from 
Tropical South America and San Domingo. 
1. Cosmotoma rubella. (Tab. XIII. fig. 8.) 
Cosmotoma rubella, Bates, Ann. & Mag. Nat. Hist. ser. 3, xiii. p. 148 (1864) *; id. Trans. Ent. Soc. 
1872, p. 237°. 
Hab. Nicaraaua, Chontales (Belt 1).—Souta Amzrica, Amazons. 
Mr. Belt appears to have met with only one example of this insect. 
IDEPHRYNUS. 
Corpus elongato-ovatum, supra valde tuberculatum et parce cristatum. Caput antice transversum, verticale, 
infra oculos parvulos modice prolongatum, inter antennas parum depressum. Antenne (<) corpore fere 
duplo longiores, robust, filiformes, subtus parce setose ; scapus modice elongatus, mox a basi dilatatus, 
deinde usque ad apicem clavam eequalem oblongo-cylindricam efficiens ; articulus tertius paulo longior quam 
scapus. Thorax subquadratus, utrinque medio latere tuberculo valido conico, alteroque minore anteriore, 
alterisque duobus elevatis discoidalibus armatus. Scutellum marginibus lateralibus elevatis. Elytra 
versus apicem angustata, apice utrinque longe unispinosa ; supra modice convexa, valde inequalia, carina 
centro-basali utrinque crassa tuberculata, alteris tuberculis in series irregulares longitudinales tres vel 
quatuor digestis. Pedes, sicut in Alcidio, Lophopeo, etc., validi ; femora clavata ; tarsi posteriores articulo 
primo duobus sequentibus equali. Pro- et mesosternum subangusta. 
The affinities of the singular little species for which this genus is constituted are 
with Leptostylus and Lophopewm, especially with such species of the latter as have 
roughened or fasciculated elytra and bituberculated disk of thorax. 
8. Idephrynus scaber. 
Fuscus, elytris signatura A-formi suturali paulo ante medium, antennarumque articulis basi (tertio quoque 
annulo mediano) testaceis; elytris punctatis, seriatim tuberculatis, tuberculis centro-basalibus et alteris 
utrinque prope medium longioribus ; pedibus testaceo-variegatis. 
Long. 47 lin. 
Hab. Muxico, Cordova (Sallé). 
This curious insect has a general resemblance to certain Dorcadionini, especially 
Dorcadida bilocularis (White). 
