AMERICAN COLEOrTERA. 117 



The tarsi on all the feet are broad, the first joint of hind tarsus not 

 quite as long as the next two. The antennae are not ciliate. 



The above remarks, it may be needless to say, are applicable to the 

 genera of our fauna only. These are known as follows : 



Lateral spine of thorax very prominent, the disc tuberculate, antennae much 



longer than the body LiagoChirns. 



Lateral spine obtuse, disc not tuberculate, antennae not longer than the body 



in either sex C'dcuopceus. 



In the males of both genera the sixth joint of the antennae is pro- 

 longed inwards and with a brush of hairs in Laffochirus, which has 

 also the anterior tarsi dilated and fimbriate and the same tibia fimbri- 

 ate within near the tip. 



Coenopcetcs is founded on Leptostylus Palmeri Lee, the reasons for 

 its position will be found further on. 



LAGOCHIRUS Erichs. 

 A genus composed of species of moderately large size, represented 

 in our fauna by two Ibrms occurring on our sub-tropieal borders, the 

 one in Florida the other in Lower California, distinguished in the 

 following manner: 



Punctures of elytra barely attaining the middle, humeral region submuricate, 

 disc with very evident rows of short, erect scale-like hairs. 



araiicirorniis Linn. 



Punctures extending to apical fourth, humeral region simply punctured, disc 

 with feeble traces of tufts obsoletus Thorns. 



C<E1^0P<EUS n. g. 



Allied to Lagochirxis differing as follows: Antennae as long as the body J, 

 a little longer % , not ciliate beneath, first joint extending to the middle of the 

 thorax, second small, third equal to first, joints 4 — 10 gradually decreasing in 

 length, joints 3 — 4 together a little shorter than 5 — 6 — 7 together, joint six pro- 

 longed inwards at its tip, without brush of hairs. Thorax transverse, hexagonal, 

 moderately convex, surface irregular but not tuberculate, sides angulate at 

 middle but not acutely spinous. Elytra oblong, moderately convex, slightly 

 narrowing posteriorly, apices obtusely rounded. Legs robust, femora strongly 

 clavate, pedunculate at base, the anterior a little shorter than the middle, the 

 posterior shorter than the elytra. Tarsi moderatelj' dilated, a little broader in 

 the male but not fringed with hairs, the first joint a little shorter than the 

 next two united. Last abdominal segment moderate, subtruncate % , very little 

 longer 9 • Prosternum moderate between the coxae, mesosternum broad, gradu- 

 ally declivous, nearly flat. Body finely pubescent, without erect hairs. 



This genus is founded on Leptosti/lus Palmeri Lee, an insect very 

 nearly as large but a little more convex than Lagocliirus araneiformis. 

 It has been removed from association with Leptostylus by its thorax 

 being angulate at middle and by the structure of the tarsi. The 

 antennal character of the male adds weight to its position near 



