46 INSECTA. 



of those four principal corneous or connivent pieces of which it is 

 composed in the preceding tribe, but by the approximation of its in- 

 terior fleshy columns. The chylific ventricle is proportionally longer, 

 and the spermatic capsules are less numerous. These Insects, accord- 

 ing to the same naturalist, are provided with a double excremen- 

 titious secreting apparatus, totally differing in structure from that of 

 the Pentamera. It consists of two tolerably large oblong bladders, 

 situated altogether under the viscera of digestion and generation, 

 closely approximated to each other, with extremely thin parietes, and 

 surrounded Avith adhering vascular folds more or less turgid; the 

 precise point of their insertion, from the utter impossibility of unroll- 

 ing them, can scarcely be determined. The sam.e remark applies to 

 the canals by which the secreted liquid is evacuated; they are con- 

 cealed by a sort of membranous diaphragm, which, by means of a 

 fleshy panicle, is applied to the last segment of the venter. The se- 

 creted fluid issues laterally from the last annulus, and not from its 

 extremity; it is ejected to the distance of seven or eight inches, is 

 brownish, acrid, extremely irritating, and has a peculiar and pene- 

 trating odour. 



This tribe is formed of a single genus, that of 

 Blaps. 

 Those, in Avhich the body is generally oblong, with the abdomen 

 clasped laterally by the elytra, that are most usually narrowed towards 

 the end, and terminated in a point or in the manner of a tail, and in 

 which the tarsi are almost similar in the two sexes, and without any 

 notable dilatation, Avill form our first division. 



The mentum in some is small, or hardly occupying in width more 

 than the third of that of the under part of the head, and almost square 

 or orbicular. 



Here, all the tibise are slender, without strong ridges or teeth on 

 the outer side. The thorax is never dilated anteriorly, nor in the 

 form of a widely truncated heart. In 



OxuRA, Kirb., 

 The body is narrow and elongated; the thorax longer than it is wide, 

 ovoid, and truncated at both ends; and the intermediate joints of the 

 antennae long and cylindrical*. In 



ACANTHOMERA, Lat. PiMELIA, Fah., 



The thorax is almost orbicular and transversal; the abdomen nearly 

 globular; the third joint of the antennae cylindrical and much longer 

 than the following ones, which are almost of the same form, and the 

 three last at most granose f . 



* Oxuru seiosa, Kirby, Lin. Trans., XII, xxii, 3. 

 e f Pimelia denfipes, Fab., and some other species. The anterior thighs are inflated 

 and deatated ; the body is very unequal and cinereous ; the spurs of the tibiae vei7 

 small. 



