160 ZOOLOGY. 
flowers. The families are: 1, Cistelide; 2, Helopide ; 3, Diaperide ; A, 
Tenebrionide ; 5, Blapside ; 6, Pimeliide. Of these, the three first are 
variously colored, and constitute Westwood’s sub-tribe Varicolores. The 
remaining three are black or obscure, and constitute the Melasomata ot 
Latreille. 
The Zenebrionide are well known from the meal bug (Zenebrio molitor), 
the round hard larve of which, as well as the perfect insect, are found in 
flour, sea-biscuits, &c., upon which they feed. 
The Llapside of the United States occur in the region of the Rocky 
Mountains, whence they extend to Texas. 
The insects of the section Zetramera include those Coleoptera which have 
four movable articulations to all the tarsi. They are very numerous, and all 
of them are vegetable feeders, both in the larva and perfect state. They are 
divided into three stirpes, of which the 2Aincophora have the head produced 
into a rostrum, and the antenne generally short and elbowed. The 
Longicornia have long antennee and an oblong body ; and the Phytophaga 
have a short round body and short antenne. There are many beautiful 
insects among the Tetramera, but except among the Longicornia, they are 
generally less than an inch Sitios 
The Lhincophora (pl. 81, es 65-76) are numerous in species, of which 
about 8000 have been Heer in the great work of Schcenherr. The 
mouth is situated at the end of the rostrum, which is sometimes very 
slender, and as long as the rest of the body. The insects known as weevils, 
which are destructive to various kinds of seeds, belong here, and the seeds 
of a great many vegetables are attacked by peculiar species. The elytra 
are often connate, or united in a single piece, and with the exterior parts, 
they are often so hard that it is difficult to stick a pin through them. Some 
are beautifully marked with brilliant minute scales, which are favorite 
objects for viewing with the microscope. The English have named several 
of these diamond beetles, on account of the appearance of these scales. The 
divisions of Rhincophora by Scheenherr are here given, from the fifth 
volume of his Genera et Species Curculionidum, 1839. It will be observed 
that his use of the words order, family, &c., is peculiar to himself. 
Sup-ram. 1. Genvtnt. 
Orvo I. Gonatocert. Antenne geniculate, basal articulation received 
into a groove in the side of the rostrum. 
Leeto 1. Bracuyruyncur. Rostrum short and robust. Divisions 
(Phalanx 1): Brachycerides, Entimides, Pachyrhynchides, 
Brachyderides, Cleonides, Molytides, Byrsopsides ; ‘since 2) 
Phyllolides, Cyclomides, Otiorhynchides. | 
Lecio 2. Mercornyncut. Rostrum cylindric, lengthened, with the 
antenne between its base and middle. Divisions: Erirha- 
nides, Apostasimerides (sub-divisions: Cholides, Baridides, 
Cryptorhyncides), Conophorides, Cionides, Rhyncophorides, 
Cossonides. 
364 
