376 INSECTA. 



The second tribe, that of the PYROCHROIOES, approaclies the first in the 

 tarsi and the anterior elongation and narrowing of the body, but it is flattened, 

 and the thorax is almost orbicular or trapezoidal. The antennae, at least in 

 the males, are pectinated or plumous ; the maxillary palpi are slightly serrated, 

 and terminated by an elongated and almost securiform joint ; the labial palpi 

 are filiform; the abdomen is elongated, entirely covered by the elytra, and 

 rounded at the extremity. 



These Heteromera, which are found in the spring in woods, and whose 

 larva; live under the bark of trees, form the genus 



PYROCHROA, Gcoffroy. 



In Pyrochroa, properly so called, the antennae are simply pectinated and 

 shorter, the eyes are remote from each other, and the thorax is almost orbi- 

 cular and transversal. 



In the third tribe, that of the MORDELLON.*, so far as respects the form of 

 the joints of the tarsi and of their hooks, and of that of the antenna; and 

 palpi, we find no conimon and constant character. These insects, however, 

 are easily distinguished from other Heteromera of the same family, by the 

 general conformation of their "body, which is elevated and arcuated; the head 

 is low, the thorax trapezoidal or semicircular, and the elytra are very short 

 or narrowed, and terminate in a point, like the abdomen. They form the 

 genus 



MORDELLA, LinncEUS. 



In Mordella properly so called, the antennae are of equal thickness through- 

 out, and somewhat serrated in the males; all the joints of the tarsi are entire, 

 and the hooks of the last present one or two indentations beneath. The eyes 

 are not emarginate. 



M. Leon Dufour observed in the Mordel/e a bandes, two floating salivary 

 vessels longer than the body. The hepatic vessels have no coecal insertion, 

 an exceptive character in this section of the family. 



The subgenera are Ripiphorns, Myodites, Pelocotama, and Anaspis. 



In the fourth tribe, that of the ANTHICIDKS, we find the antenna? simple or 

 slightly serrate, filiform, or a little thicker towards the extremity, most of the 

 joints being nearly obconical and almost similar, with the exception of the 

 last, which is somewhat larger and oval. The thorax is sometimes obovoid, 

 narrowed, and truncated posteriorly, sometimes divided into two knots, and at 

 others semicircular. Some of these insects are found on various plants, but 

 the greater number live on the ground. They run with great quickness. 

 Their larva? are perhaps parasitical. 



They will compose the genus 



NOTOXUS, Geoff roy. 



In Notoxus properly so called, the antennae enlarge insensibly, and are almost 

 entirely composed of obconical joints, and the thorax is obovoid, narrowed and 

 truncated posteriorly, or divided into two globular points. 



