3G8 1NSECTA, 



South America. The head is large, with almost setaceous antennae 

 nearly as long as the body ; the external palpi are very salient, and 

 terminated by a thicker joint elongated and pyriform ; the penulti- 

 mate joint of the external maxillary palpi shorter than the following 

 one ; the two first joints of the labial palpi very short, and the ter- 

 minal lobe of the jaws without any apparent unguiculus at the ex- 

 tremity. The abdomen is oval, strangulated at base and pediculated. 

 The legs are long and slender. 



The Ctenostomae approach the Megacephalae in the size of their 

 palpi, and in other respects approximate to the Tricoiidylae and 

 Therates*. 



The others have no tooth in the middle of the emargination of the 

 mentum. The labial palpi are contiguous at their origin, with the 

 first joint obconical or in the form of a reversed pyramid, and di- 

 lated or prolonged interiorly in the manner of an angle or tooth ; the 

 exterior maxillary palpi hardly extended beyond the labrum. These 

 species have been distributed into three subgenera. 



THERATES, Lat. EURYCHILE, Bonel. 



The Therates in their general form resemble the true Cicindelee, 

 but are distinguished from them, as well as from all other analogous 

 subgenera, by their internal maxillary palpi, which are very small 

 and acicular. The tarsi are similar in both sexes, with the penulti- 

 mate joint cordate, unemarginate, and simply excavated above for 

 the insertion of the last. 



These Insects are exclusively proper to the most eastern islands 

 of Asia, as Java, those of Sunda, and such as are to the north of New 

 Holland f. 



In the two following subgenera, both proper to the East Indies, or 

 the remotest of the Oriental islands, the body is narrow and elon- 

 gated, and the thorax almost cylindrical, or in the form of a knot. 

 The third and fourth joint of the tarsi is prolonged interiorly in the 

 manner of a lobe. 



COLLIURIS, Lat. COLLYRIS, Fab. 



Furnished with wings; antennae thickest near the end; last joint 

 of the labial palpi almost securiform, and the penultimate frequently 

 curved ; thorax nearly cylindrical, narrowed and strangulated before, 

 with the anterior margin widened ; abdomen almost cylindrical, 

 widened and enlarged posteriorly ; tarsi similar in both sexes, the 

 penultimate joint prolonged obliquely on the inner side, as large as 

 the preceding one ; the latter in the form of a reversed triangle with 

 acute angles J. 



* See the Entomologise Brazilians Specimen of Kltig ; tue Spec. Gen. des Coleop. 

 of Count Dejean, I, p. 152, et seq., and the Supp. to vol. II of the Hist. Nat. des 

 Coleop. d'Eur., fascic. I, p. 35 ; the Entora. Imp. Russ. of M. Gotthelf Fischer, 

 I ; Gener. Insect, p. 98. 



f See Lat., Dej. Hist. Nat. des Coleop. d'Eur., fascic. I, p. 63 ; the Spec. Gen. 

 des Coleop. Dej., I, 57, and the Supp. to vol. II; and particularly the memoir of 

 Bouelli on this genus. 



J See the works just quoted. The species which I have described and figured 

 under the name of longicollis is distinct from the Fabrician species of the same ap- 

 pellation ; it is the Colliuris emaryinata, Dej., Spec. Gener., I, p. 165. 



