2S0 [M'ly. 



fully aware that in its maxillae being distinctly bilobed, and its feet 

 (as I cannot but tbink) strictly trimerous, it is removed in two very 

 important particulars from tbe members of tbat family. Still, tarsal 

 joints are so apt to be difficult, occasionally, of precise determination, 

 tbat it is not impossible tbat I may be mistaken in defining them in 

 this instance as positively only tbree in number, and tbat an exces- 

 sively diminutive articulation may be concealed at tbe base of tbe 

 elongated terminal one ; in wbicb case one at all events of tbe points 

 in wbicb it disagrees witb tbe Corylophidce would be taken away. 



In many of its secondary details, Aphanocephalus is sufficiently 

 in barmony witb certain of tbe types around Coryloplms, — sucb, for 

 instance, as tbe somewhat inflated second joint, and the fusiform 

 ultimate one, of its maxillary and labial palpi, as well as its uue- 

 marginated ligula and upper lip ; but in tbe vinusually abbreviated 

 third joint of its maxillary palpi it is singular ; and its mandibles 

 (which are deeply bifid at their tip, and have a minute denticle im- 

 mediately within the apex) are remarkable for being furnished with a 

 eharj), incurved, and minutely cleft additional tooth, considerably 

 below the denticle to which I have just alluded, and at the commence- 

 ment of the membranaceous portion which fills up the large internal 

 cavity. In its antennae, only nine articulations can be distinctly 

 counted (a number which, no less than that of ten, is quite in keeping 

 with certain groups of the Corylophidce) ; but it is evident that their 

 extremely solid and abrupt club is in reality made up of (at all 

 events) two, and that they should more properly therefore be defined 

 as 10-jointed ; and the coarse margin of its elytra, in conjunction 

 with the narrower one of its prothorax, gives the genus an additional 

 feature which ought not to be overlooked. 



The only family (witb the exception of the TrichopterygidcB) in 

 which, so far as I am aware, the feet are strictly 3-articulate is tbe 

 Lathridiadce ; but it would be almost preposterous to suppose that 

 Aphanocephalus can have anything in common, beyond the abnormal 

 number of its tarsi joints, with the members of that department : and 

 yet a few of its other peculiarities Kkewise, moi'e particularly as re- 

 gards the construction of its antennae and capitulum, are by no means 

 distantly paralleled in (for instance) the genus Cholovocera. 



Aphanocephalus hemisphjekicus, n. sp. 



A. sub-rotundatu8, hemisphiEricus, niticlus, supra convcxus calvus et seneo-viridi- 

 thictus, sed subtus minutiBsinie parceque sericatus ac rufo-piceus ; capite parvo, sub- 

 perpendieulari (fere c visu absoondito), piceo-ferruginco ; prolhorace elytrisque ad 



