REVISION OF TENEBRIONID SUBFAMILY CONIONTINyE l6l 



ADDENDA. 

 I. 



Having recently received a number of species of Praocini and 

 Nycteliini from Mr. Rolle, it becomes evident, even upon 

 cursory examination, that the subfamily Coniontinas should in- 

 clude both of these tribes and that the definition of the subfamily 

 previously given must be so generalized as to receive them. 

 The hind coxas, for example, very extended, oblique and com- 

 paratively slender in the North American tribes, become much 

 more abbreviated, subtransverse and ovoidal in the South 

 American groups, having there very nearly the prevailing form 

 of the Asidinae. The isolation of the Coniontinae as a subfamily 

 will therefore depend, as in so many other subdivisions of the 

 Tenebrionidae, upon the peculiar combination of a number of 

 characters, no one of which is absolutely constant but together 

 constituting a characteristic facies or habitus. Among the more 

 salient of these subfamily features may be mentioned antennal 

 structure, prolongation backward of the posterior thoracic 

 angles, porrect prosternal process, more or less pronounced 

 obliquity of the hind coxse, sparsely spinulose tarsi, rather 

 small, emarginate and obtrapezoidal mentum, generally exposed 

 and densely chitinized emarginate ligula, bifid mandibles, 

 sinuate clypeus and exposed emarginate labrum, well developed 

 tibial spurs and frequent basal dilation of the epipleuras. I 

 would propose the following arrangement of such tribes as are 

 represented by the material in my collection : — 

 Antennae long and slender, with or without a loose 3-jointed club... 3 



Antennae very small, compact, with a feeble, compact and fusoid club, 

 the basal joint unusually developed 5 



2 — Ligula wholly concealed ; gular sutures united and forming a 

 single furrow for a considerable distance behind the mentum ; 

 legs long; posterior coxae nearly as in Asida, widely separated 

 and subtransversely oval ; antennae peculiarly hispid, not clavate, 

 the last joint smaller, oval, pointed ; elytra widely embracing the 

 body, the epipleurai dilated basally. Southern South America. 



* Nycteliini 



Ligula largely exposed, densely chitinized; legs much shorter 3 



