COLEOPTEUA. 433 



generally visible above, or merely occupies a portion of the space 

 comprised between the posterior angles of the thorax and the exte- 

 rior base of the elytra. The thorax does not widen from before pos- 

 teriorly, as in the Cetoniae. The outer side of the elytra is not ab- 

 ruptly narrowed or unisinuate a little below the humeral angles, as 

 in the latter Insects. A more rigorous character, however, is, that 

 here the labial palpi are inserted in lateral fossulse of the anterior 

 face of the mentum, so that they are entirely exposed, and that the 

 sides of this mentum jut beyond them, even at their origin, and 

 protect them behind. In the two first divisions these palpi are in- 

 serted under the lateral margin of the mentum, or even in the mar- 

 gin, so that when viewed from before the first joints are not per- 

 ceptible. 



In the first Trichides the mentum is either isometrical, or longer 

 than wide, and leaves the maxillae exposed. It comprises the 



Trichius, Fab.(l) 



T.nobilis; Scarabeeus nobilis, L.; Oliv. , Col., I, 6, iii, 10. 

 About an inch long; golden-green above; cupreous with yellow- 

 ish-grey hairs beneath. On umbelliferous plants. 



T. fasciatus; Scar abseus fas ciatus, L. ; Oliv., lb., ix, 84. Ra- 

 ther smaller; black, with scattered yellow hairs; elytra yellow 

 with three transverse, black bands, interrupted at the suture. 

 Very common in spring on flowers. 



T. eremita; Scarab, eremita, L. ; Oliv., lb., iii, 17. Large, 

 and of a brown-black; margin of the head turned up; three sulci 

 on the thorax. On the trunk of old trees, in the interior of 

 which resides the larva. 



The female of the T. hemipterus Scarabasus hemipterus, L., 

 Oliv., lb., IX, 83, xi, 103 and those of some other species of 

 North America are remarkable for the horny ovipositor at the 

 posterior extremity of their abdomen, by which they effect a 

 lodgement for their ova. 



These species are generally found on the ground, where they 

 move very slowly. The last joint of their maxillary palpi is 

 proportionably shorter and thicker than that of other Trichii; 

 the length of the first of the posterior tarsi also appears to me 

 to be considerably greater than the following one, while in the 

 other Trichii it is not so(2). 



(1) Messrs Lepeletier and Serville, Encyc. Method., have established several 

 new divisions, some of which, it appears to us, should form separate subgenera. 



(2) See Schcenherr, Synon. Insect., I, iii, p. 99. 



Vol. III. 3E 



