254 RHYNCHOPHORA. [Tracltodinci. 



TRACHODINA. 



This tribe is extremely closely allied to the Pissodina, from which it 

 differs by the strongly toothed femora, the inconspicuous scutellum, and 

 the clothing of the upper surface ; the single genus Trachodes is very 

 nearly related to the Cryptorrhynchina through Acalles, but differs in 

 not having the prosternum channelled for the reception of the rostrum. 



TRACHODES, Germar. 



About eight species are contained in this genus which are found in 

 Northern Asia (chiefly in Siberia and Kamtschatka) and Northern and 

 Central Europe ; they are small dull insects, with the elytra connate 

 and gibbose, the prosternum emarginate at apex, the tibiae bisinuate on 

 their internal margin, and the posterior coxae subglobose ; the femoral 

 teeth are very large and strong ; they are found in faggots, and very 

 little, apparently, is as yet known about them. 



T. hispidus, L. (squamifer, Gyll.). Oblong, convex, blackish- 

 brown, clothed with coarse blackish and ashy scales, rostrum, antennae 

 and legs reddish-brown ; rostrum rather long, curved ; antenna? inserted 

 behind middle ; thorax as long as broad, rounded at sides, with a row 

 of large dark raised scales on each side of centre and a lighter row 

 towards margin ; elytra dark with common wavy grey fasciae towards 

 apex, alternate interstices with rows of large raised scales ; femora 

 elavate, with very strong pointed triangular teeth. L. 2j-4 mm. 



Iu woods; by beating old faggots of oak and beech sticks; rare; near Carlisle 

 (Heyshaui); New Forest (one specimen, May, 1850, Walker); Buddon Wood, 

 Leicestershire (Bates, Plant, &c.) ; St. Leonard's Forest (Power) ; it is also marked 

 in Mr. Moncreaff's list as from Grange, near Gosport. 



ORCHESTINA. 



The members of this tribe are, with very few exceptions, easily known 

 by the development of the posterior femora, which resemble those of the 

 Halticidae and enable the insects to leap greater or lesser distances 

 according to their size and thickness, which is variable in the different 

 species ; the rostrum is inflexed, and the antennae have rather a short 

 scape ; the eyes are free and, as a rule, prominent ; the elytra are con- 

 siderably broader than the thorax, with the shoulders well marked and 

 the tenth stria joined to the ninth behind the metasternum. 



The larvae live on leaves, for the most part of trees ; they mine the 

 parenchyma, like the larvae of many Micro- Lepidoptera, and after attain- 

 ing their full size they form a cocoon in their mines or galleries, from 

 which the perfect insect in a short time emerges ; the galleries may 

 easily be detected by their reddish or brownish appearance and by being 

 slightly raised above the surface of the leaf. 



