'200 



resemblance to the CorylophiJa. Its antenu.-c are I'ormed on an entirely different 

 tj'pe, and tlieir small solid club is not vertically doubled back upon the funiculus, 

 as it is in all the Cdrt/lophicLe. The maxilht are three-lobed after the fashion of the 

 Trii-liopteriiiiiila- with this small difference, that the outer lobe is not on the same 

 level with the other two. The wings in shape and neuration resemble those of the 

 Silphidie, but are wholly unlike the Corijlopliithe. The tarsi, examined in Canada 

 balsam,- present no vestige of the small penultimate joint universal among the 

 Coryl<)})huhe, but are clearly three-jointed. And in the excessive development of the 

 mesosterual epimera Apliaiwccphultis again resembles the Trichopteryfi'uhe. 



The three-jointed tarsi and general superficial appearance of this genus 

 reminds one of the CocciucUidte, but the resemblance extends no farther, and can at 

 the most but form an indication of its systematic position. 



On these grounds I have determined to separate Aphanoccphaliis from the 

 Corylophidte, and to place it next to the Cuccincllida ; to which the form of all its 

 sj^ecies and the colour of some among them bear a well-marked resemblance. 



SPECIERUM TABULA SYNOPTICA. 



Corpus hoiiiispbericnm. 

 Caput pronoto obtectum. 



Superficies glabra impunctatus. 



,, punctata hemisphericus. 



Caput promiuens WoUastoni. 



Corpus baud hemispbericum, capite plus minusve exserto. 

 Elytra ad humeros baud contracta. 



Forma ovalis, sculptura profuudii 4-maculatus. 



,, ovata, sculptura Irevi ....... vitreus. 



Elytra ad bumeros contracta dissimilis. 



Aphanocephalus impunctatus. 



.1. iinpiinctiitus, Matthews, Ann. and Mag. Nat. Hist. 1887, p. 114. 



L. c. 1 j-y lin. --'I'lo mm. — Omuino hemisphericus, impunctatus, nitidissimus, 

 aterrimus, pronoto antice ferrugiueo ; pronoto parvo, perbrevi, antice levissime ex- 

 cavato, margiue antcriori ferruginea, margine basali leviter rotundata, angulis 

 obtusis ; cli/tris permagnis, pronoto multo latioribus et fere triplo longioribus, ad 

 media latissimis, superficie inaequali iudistincte alutacea, lateribus late marginatis, 

 apice latissimo ; imlihus piceis, tarsia flavis ; antennis sat brevibus, flavis, clavis 

 obscurioribus. 



Body perfectly hemispheric, impunctate, very shining, deep black, with the front 



of the thorax ferruginous. 

 Head slightly visible, black, and very shining, with the mouth ferruginous ; eyes 



moderate, prominent ; antennas rather short, yellow, with the club dusky. 

 Thqi-iix small and very short, slightly excavated in front, impunctate, and very 



shining, anterior margin ferruginous, basal margin slightly rounded, with the 



angles obtuse. 

 ScuteUtim moderate, triangular. 

 Elytra very large, much broader and nearly three times longer than the thorax, 



widest at the middle, uneven and indistinctly alutaceous on the surface, sides 



broadly margined, apex very broad. 

 Legs moderate, piceous, with the tarsi yellow. 

 Under 2)arts black, metasternum deeply alutaceous. 



