26 Longicornia Malay ana. 



EXOCENTRIN-^. 



This sub-family is very nearly allied to the last ; indeed, latterly, 

 authors have not made any distinction between them. M. Mulsant, 

 who, first proposed the sub-family or " Branche" as he termed it, 

 under the name of ^' Po(ronocheraircs," only mentioned the three 

 genera Pogonocherus, Exocentius and Stenidea, M. Thomson places 

 the first and last of these in his sixth " Groupe Saperditce," Exocen- 

 trus taking its place in the second " Groupe Acant/iocinitde" with 

 two or three other genera which I refer to this sub-family. M. 

 Thomson is probably right in the position he assigns to Stenidea, 

 but I think Vogonochcerus cannot be put far from Exocentrus, and 

 as the latter is the most typical of the two it would be more 

 appropriate to take its name for the sub-family. 



The Exocenlrinae have the face convex or rounded, generally 

 short and transverse ; the antennary tubers pretty far apart, so 

 as only to leave the usual mesial line, with very little tendency to 

 depression between them : the eyes are small or of moderate size, 

 deeply and widely emarginate ; the mandibles rather feeble and 

 without teeth, and the palpi are pointed. The antennae are variable, 

 but they are never so long as in many of the preceding sub-family ; 

 very often the joints are short and thick, or even tumid, almost 

 always with a fringe of stiffish hairs beneath, or the whole of those 

 organs is more or less hairy. The prothorax is generally armed at 

 the side with a short spine, which is often placed near the base; in 

 some genera this part shows a remarkable tendency to arching or 

 curving upwards above the level of the elytra, and the disc is 

 occasionally armed with two spines. The elytra are more or less 

 oblong, with the apex entire, at least so far as the species of tliis 

 collection are concerned. The legs are of moderate length, the 

 femora always clavate, the intermediate tibiae emarginate, and the 

 tarsi never elongate ; the anterior coxae are large and standing 

 well out of their acetabula, and these latter are either entire or 

 angulated. The species are all of small size, rather depressed and 

 very often clothed with long erect hairs, which are sometimes stiff 

 enough to be called " seim." They are found in all parts of the 

 the world, and are represented in Australia by the genera Pen- 

 tacosmia, Newm., and Ameipsis, Pasc. (each of one species only), 

 and Exocenlrus erineus, Pasc. ; in New Zealand, by the Lamia crista, 

 Fab. ; but there can be no doubt that these numbers will be con- 

 siderably increased when the insects of those countries shall be 

 better known. In the present collection we have twenty-two 

 genera and and forty-nine species. 



