7ieic genera and species of Tenehrionida. 271 



segments bisinuately emarginate behind, the 4th very 

 strongly so in $ , less in ? , the coriaceous hind margin of 

 the same segments indistinct consequent on their being 

 somcAvhat loosely imbricate. 



$ ? In what I take to be tlie female form of this 

 genus, besides the differences already given, the antenna, 

 legs and tarsi are shorter, the form broader, more massive, 

 more depressed ; the palpi much shorter, the last joint of 

 the labials triangular or very briefly cultriform, that of the 

 maxillary moderately cultriform ; the prothorax is not 

 sinuoush/ expanded at the sides from the apex to beyond 

 the middle, and the fore angles are directed forwards (not 

 outwards, as in the ^ ) ; the anterior tibias are unidentate 

 outwardly, (as in the $ ,') but this tooth, and the outer 

 spur, are shorter and blunter, and the apex of the tibias is 

 outwardly produced into a short robust sujiport to the outer 

 spur which is implanted in it. 



A remarkable genus which takes somewhat the same 

 relative position in the Helceides that Anomalipus does in 

 the Opatrides. The characters that are decidedly ex- 

 ceptional to the " tribe," or sub-family, are : the divided 

 eyes ; the lozenge-shaped mentum, partially concealing the 

 labium ; the short, sub-compressed antenna3 ; the last joint 

 smaller than the penultimate ; the unidentate anterior 

 tibire ; and the tarsi broadly concave, or flattened, and 

 glabrous on the underside. In form it most nearly ap- 

 proaches Nyctozoilus ohesus, and it has the broad parallel- 

 sided intercoxal process, and the angular depression behind 

 the scutellum, as in that genus, but the sides of the pro- 

 thorax are decidedly foliaceous, and the head is differently 

 formed, agreeing more closely, in this respect, with Saragus: 

 the form and position of the spurs to the anterior tibige 

 also approach the present genus to Saragus, through 

 *S'. IcevicoUis ; properly it should constitute a distinct sub- 

 division in the tribe ; but I hesitate to do this at present, 

 as I think that, before long, the whole tribe wiU require 

 remodelling. 



There apjiears to be a good divisional character in the 

 form of the intercoxal process, and in the modifications in 

 form, &:c., that the mesothoracic parapleura3 undergo, thus : 

 in Eiicaro, Pterohelceus, HelcEus, Symjietes, Saragus, Os- 

 pidus, and Cilihe, the intercoxal process is narrow and 

 more or less attenuate at apex ; and the epimera more or 

 less broadly enclose, or shut out laterally, the episterna 

 fl'om the sides of the mesothorax : in Saragodinus, Nycto- 



