COLEOPTEUA. 535 



TmesisternuSj Lat. 



Where the antennae are simple, setaceous, and longer than the body; 

 the thorax is lobate posteriorly, and the prsesternum prolonged be- 

 hind, truncated, and received into the emargination of the mesos- 

 ternum(l), 



Tragocerus, Dej. 



Where there is no prsesternal projection; the antennae are filiform, a 

 little shorter than the body and somewhat serrated; the thorax is 

 unequal, slightly sinuous laterally, and the elytra form a large 

 square(2). 



Leptocera, Dej. 



Where the praesternal projection is also wanting; but the antennae 

 are setaceous and much longer than the males; the thorax is smooth 

 and in the form of a truncated cone, and the abdomen and the elytra 

 are almost triangular(3). 



The Longieornes of our third tribe, that of the Lamiari^, 

 are distinguished by their vertical head, and by their palpi, 

 which are filiform or hardly larger at the extremity, and ter- 

 minated by a joint more or less ovoid and tapering to a point. 

 The outer lobe of the maxillsB is slightly narrowed at the end, 

 and curved on the inner division. The antennae are most 

 frequently setaceous and simple, and the thorax, exclusive of 

 the lateral tubercles or spines, is nearly of an equal width 

 throughout. Some species are apterous, a character exhi- 

 bited by no other division of this family. 



This tribe is composed of the genera Lamia and Saperda 

 of Fabricius, of some of his Stenocori, and of the Colobotheai 

 of Count Dejean, as well as several of his Gerambyces; but I 

 have not yet succeeded in detecting characters which clearly 

 separate the first of these genera from the following one. 



(1) Undescribed Insects from New Holland which are closely related to the 

 Callidia variegatum, lineatum, and sulcatum. Fab. 



(2) Dej., Catal., iii. 



(3) Ceramhyx scriptus, L., Isle of France. For these genera, see the Trans. 

 Law. Soc, and Donovan's work on New Holland Insects. 



