f2-articulata. 



ENGIDiE. — TRICHOPTERYX. 



f absconditEe : 



59 



11, clava \ 



(_ 3-articu 

 lata. An- 

 tennarum 



articulo 



ulce\ 



I fcrenulatis: 



l^exsertae. Tho- < 

 racis late.r'ibus ( integris : 



f ("articulo ultimo securiforme 



2-do. 

 | 3-tio 



I 1 aequale. 



Lfiliformes. C elongatus : 

 Thorax< 



l_ iransversus : 

 i_2-do, 3-tio fmarginatus : 

 longiore. | 

 Thorax^ 



(_immar- Tintegra: 

 ginatus. 

 Elytra< 



163. BlTOMA. 



168. Lyctus. 

 167« Xylotbogus. 

 161. Crypta. 



162. Sylvanus. 



157. TRIBOLIUM. 

 166. Latkidius. 



164. CoiiTICARIA. 



(_truncata: 165. Eutheia. 



Genus CXXXVIII. — Trichopteryx, Kirby. 



Antennae about half as long as the body, the two basal joints large, robust, 

 cylindric, the six following very slender, filiform, the articulations of nearly 

 equal length, the three last stouter, forming an elongate nodose club, and fur- 

 nished with long hairs. Palpi filiform, minute : head convex, large, triangular : 

 thorax large, broad, convex, the sides rounded and somewhat dilated : ncu- 

 tellum large, triangular : body slightly convex ; the breast on each side with 

 a broad quadrate laminated process: wings with the apex produced into 

 several bundles of hairs, or capillaceous : elytra rather broad, slightly trun- 

 cate at the apex. 



The singularly fasciculated capillaceous wings of this curious 

 genus at once point out its difference from the kindred min ut 

 genera of Anisartliria and Atomaria; insects in general of such 

 atomical dimensions that it is nearly impossible to give an adequate 

 idea of their distinctions, though to an experienced eye they may 

 appear to differ considerably : and in the present state of our know- 

 ledge of such minute genera the attempt " to unite each sex to its 

 legitimate partner" is in many cases impossible, neither can we 

 always " with certainty distinguish the species from the variety ;" 

 it is therefore not without considerable hesitation that I venture to 

 separate the following apparent species in this and the two suc- 

 ceeding genera. 



