CLERIUAE. 217 



or indistinct; tarsi 5-jointed, tlic fourth joint in Enopliini 

 very small and indistinct; joints 1— i furnished beneath with 

 membranous appendages ; claws simple or toothed, never 

 with membranous* appendages as in Melyridte. 



A tolerably iiuinerous family of insects found on plants, or on 

 the trunks of trees, but which in the larva state are carnivorous, 

 preying upon other insects like tlie Lanipyridie and Melyridae. 

 The larvae of various Trichodes are found in the nests of bees. 

 A few (Corynetes, Xecrobia) live on dead animal matter. Many 

 of the species are of beautiful color and graceful form. 



The genera may be arranged in two tribes. 



Tarsi -with fourth joint of normal size ; pronotum continuous witli the 

 flanks of the thorax. Clerini. 



Tarsi with the fourth joint very small and indistinct ; pronotum separated 

 from the flanks by a marginal line. Ekopliiki, 



Tribe I.— CLERIIVI. 



The fourth joint of the tarsi equal to the tliird, and the flanks 

 of the prothora.x continuous with the back, are sufficient to cause 

 tlie members of this tribe to be recognized: we may only say 

 farther, that the middle coxae are scarcely prominent, and are 

 moderately distant. Three groups are indicated by the genera 

 represented in our fauna : — 



First joint of tarsi distinct, at least equal to the second. Tilli. 

 First joint of tarsi covered by the second ; 



Eyes emarginate in front. Ci.eri. 



Eyes entire. Hydnoceki. 



Group I. — Tilli. 



Insects of a very long and slender form; tlie head is largo; the 

 eyes transverse, emarginate in front: the prothora.x long, with the 

 coxal cavities smaller than usual; the middle coxie are round, 

 sliglitly i)rominent ; tarsi with five distinct joints, the fn-st fre- 

 quently longer than the second; claws tootlied ; maxillary i)alpi 

 with the last joint cylindrical. 



Antennae 10-jointed, the last joint very long and flat. Elasmocerus. 

 Antennfe 11-jointed ; serrate; 

 Eyes finely granulated ; 



Labrum entire. Tillus. 



Labrum emarginate, posterior thighs elongated. Perilypus. 



Eyes coarsely granulated. Cymatodera. 



