207 



Elytra large, entire. 



Wings and abdomen not examined. 



Prothorax (PI. VII., B, fig. 2, a) with the prosternum rather large, elevated between 



the coxse, and acuminate posteriorly ; episterna narrow, transversely elongate ; 



epimera small, partly enclosing the coxal cavities ; coxal cavities large, partly 



open behind, not contingent. 

 Pectus with the mesnsternum (PI. YIL, B, fig. 2, d) short, deeply excavated in front; 



episterna moderate, trigonal ; epimera moderate, humeral, scarcely extending 



to the coxal cavities ; coxal cavities large, pyriform, rather widely distant. 

 metastcrnum (PL VII., B, fig. 2, g) rather short, not reaching to the sides of the 



body, with the posterior margin emarginate between the coxse ; episterna very 



long and large, extending beyond the metasternum ; epimera narrow, concealed 



by the elytra. 

 Venter composed of five segments, of which the first is the longest, the rest equal 



to each other, and the apical entire. 

 Legs anterior with the femora and tibite simple, rather long, tibiie moderately 



setose ; tarsi robust, four-jointed, with the three basal joints of equal size, 



setose, and deeply bilobed ; apical joint more slender, scarcely longer thair the 



third, incrassate on the under side near the apex ; claws robust, incrassate, 



and obtusely denticulate at the base. 

 intermediate and posterior like the anterior, but with the apical joint of the latter 



much shorter. 

 Coxce anterior rather large, ovate, almost contingent, not prominent. 

 intermediate large, pyriform, rather widely distant. 



posterior very large, oval, extending to the episterna, almost contingent, and 

 furnished with trochantins like the Cholevina. 



The genus Phainocephalus was formed by Mr. Wollaston for the reception of a 

 singular insect found in Japan by Mr. Lewis ; singular in every sense of the word, 

 since only one specimen has hitherto occurred. Although he placed Phcenocephalus 

 among the Conjlophixlm, Mr. Wollaston seems to have had much doubt as to 

 whether it really belonged to that family. It bears, indeed, a striking resemblance 

 to them in its outward appearance, but throughout its whole anatomy there is no 

 character which truly agrees with the normal type of the Coriilophid(e, while many 

 are totally diverse. For the same reasons it is equally impossible to associate this 

 genus with ApJianoeephalus ; and therefore to separate Phcenocephalus into a distinct 

 family appears to be the only course to pursue without violating the fundamental 

 rules of division. 



Although I was fortunate enough to succeed in dissecting, without injury to 

 the appearance of the specimen, the greater part of the organs of its mouth, yet, 

 as this example is the only existing exponent of the genus, I did not attempt to 

 interfere with the labrum or mandibles ; the former is described from merely 

 superficial examination, and the latter altogether omitted. 



Phaenocephalus castaneus. 



P. castaneus, Wollaston, Ent. Mo. Mag. x. p. 168, 1873. 



L. c. ^1 lin. = 1"50 mm. — Subhemisphericus, postice acuminatus, glaber, 

 nitidissimus, castaneus ; cajyite magno, lato, minute et remote punctato ; oculis 

 magnis, rhombiformibus, baud prominentibus ; pronoto parvo, perbrevi, lato, ad 

 basim latissimo, minute et remote i)unctato, interstitiis glabris, nitidis, angulis 

 anterioribus obtusis, lateribus marginatis, et valde rotundatis, margine basali 

 scutellum versus valde producta, angulis sat acutis ; elytris capite atque pronoto 

 parum latioribus, fere duplo longioribus, prope humeros latissimis, indistincte 



