168 [December, 18TS. 



pnsticis acutis sed haud productis, antice valde profunde emarginato, caput mngnum 

 lattmi cons2jiciiuin sed deflexum omnino recipiente ; oculis magnis, distantihus ; 

 scutello distincto, triangulari ; abdomine e segmentis 5 (longitudine sub-cequcdiius) 

 composito. AntejincB ll-articulatce, articulo 1""> crasso suh-quad/rato, 2'^o paulo 

 longiore et paulo graciliore, subconico-cylindrico, 3'»o hide graciliore ac sensim 

 breviore, obconico, 4'o brevi, 5*o huic paululum longio.re, 6'o, 7™° et 8^" brevihus, 

 latitudine vix crescentibus , reliquis clavam maximam elongatam laxam valde per- 

 foliatam efficienlibus (scilicet Qno et lO'"" sub-cequalibus, illo obtriangulnri, hoc 

 sub-quadrato, Umo elongato-fiisiformi basi truncato). Pedes brei'es, retractiles, antici 

 ad basin contigui, postici sub-contigui, intermedii magis distantes. 

 A " pliaino," monstro, et " cepbale " caput. 



The prima facie aspect and outline of the minute insect for 

 "wliicli I have proposed the present genus is very much that of a large 

 Gorylophus ; nevertheless, the fact of its antennae being composed of 

 eleven joints (instead of only nine) will at once separate it from the 

 members of that group. Indeed, in this particular respect, it agrees 

 with Sacium (i. e., Clypeaster, olim) and Microstagetus ; nevertheless, 

 it is abundantly distinct from both of those genera in its prothorax 

 being deeply excavated anteriorly (a character exceedingly uniisual, 

 and of great importance, in the family to which it belongs) for the 

 reception of the head, which is consequently (although deflexed) 

 completely exposed, — so exactly filling up the prothoracic cavity that 

 the two together foi-m somewhat less than the half-segment of a circle. 

 It is true that in the comparatively diminutive and sericeous Micros- 

 tagetus the head is partially visible, biit then the prothorax is not at 

 all hollowed out for its reception ; whilst in Sacium it is entirely 

 concealed, the pronotum being produced over it into a sub-pellucid 

 roof-like projection. Hence I may state that, up to the present time, 

 we have three genera of the CorylopJiidw in which the antennae are 

 11-articulate, — Sacium, Ilicrostayetus, and Phcenocephahis ; four in 

 which they are 10-jointed, — namely, Arthrolips, Gloeosoma (== Moro- 

 nillus, Duval), Sericoderus (= Grypliinus, Eedt.), and Aplianocephalus 

 (detected by Mr. Lewis in Japan) ; and two — namely, Gorylophus, 

 and Ortlioperus (= PitJiopilus, Heer, and Microsphcera, Redt.) — in 

 which those organs have the number of their articulations reduced 

 to nine. 



Ph^nocephalus castaneus, n. sp. 



P. rotundato-ovalis, rufo-castaneus, in Umbo (vix sub-pellucido) paululum diliotior, 

 convexus, calvus, politus, fere esculpturatus, — punctulis perpaucis obsoletis (nculo 

 fortiter armato), in elytris sub-longitudinaliter dispositis, obsitus ; prothorace antice 

 projunde emarginato, sed una cum capite (defiexo) fere sub-semicirculari ; antennis 

 (longiusculis) pcdibusque testaceis. Long. carp. lin. vix f. 



