272 INSECTA. 



tion. The germanica, unlike the preceding, does not fly when 

 about to be seized but escapes by running, which it does with 

 great speed. M. Fischer, in his Entomography of Russia, has 

 placed a Brazilian species (T. marginatus) in the subgenus 

 Therates. 



All these species are winged; but some apterous ones are 



known whose abdomen is also narrower and more oval, and in 



which the tooth of the emargination of the mentum is very 



small and hardly sensible. Such is the one figured in our Hist, 



Nat. des Coleop. d'Europe, I, i, 5, under the name of coarc- 



tata. Count Dejean, Spec. Gen. des Coleop., II, p. 434, has 



formed a new genus with them, that of Dromica(l). 



Sometimes the body is long and narrow, the thorax elongated, in 



the form of a knot, narrowed before;' the third joint of the two 



anterior tarsi of the males, pallet-shaped and projecting internally; 



the fourth is inserted exteriorly near its base. 



Ctenostoma, Kliig. Caris, Fisch. 



This subgenus appears to be peculiar to the intertropical regions 

 of South America. The head is large, with almost setaceous an- 

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

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

 ultimate joint of the external maxillary palpi shorter than the fol- 

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

 the terminal lobe of the jaws without any apparent unguiculus at the 

 extremity. The abdomen is oval, strangulated at base and pedicu- 

 lated. The legs are long and slender. 



The Ctenostomae approach the Megacephalae in the size of their 

 palpi, and in other respects approximate to the Tricondylse and 

 Therates(l). 



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 extend beyond the labrum. These 

 species have been distributed into three subgenera. 



Therates, Lat. Eurychile, Bonel. 

 The Therates in their general form resemble the true Cicindelse, 



(1) See the Entomologix Brasilianae Specimen of Kliig 1 ; the Spec. Gen. des 

 Coleop. of Count Dejean, I, p. 152, ct seq., and the Supp. to vol. II of the Hist. 

 Nat. des Coleop. d'Eur., fascic. I, p. 35; the Entom. Imp. Russ. of M. Gotthelf 

 Fischer, I; Gener. Insect, p. 98. 



