INSECTA MADERENSIA. 489 



A species intermediate, in size and proportions, between the European P. cada- 

 verina and hemisjjhcerica, — its elliptical outHne, however, and anteriorly acximi- 

 nated prothorax, in conjunction with its convexer and more finely punctulated 

 upper STirface, at once separating it from every variety of the former ; whilst its 

 superior bulk and darker hue, added to its more distinctly sculptured and opaker 

 body, the minute hinder fovese of its pronotum, and its submaculated elytra, will 

 equally remove it from the latter. In the strongly cUiated edges of its elytra it 

 recedes alike from them both. It is apparently exceedingly local, and confined, so 

 far as I have hitherto observed, to the island of Porto Santo, — where, in April of 

 1848, I took it in abundance, from beneath the remains of dead fish, on the 

 southern beach, about a mile to the westward of the Ciddde. 



Fam. 46. TENEBRIONID-ffil. 



Genus 164. CERANDRIA. 



(Dejean, Cat. 222) Lucas, Col. Je VAlgerie, 245 (1849). 



Corpus parvum, sublineari-elongatum : capite in maribus bicorni necnon ad frontis latera valde ex- 

 planato-recurvo : prothorace antice dilatato : metasterno postice anguste bifido : alls amplis. 

 Antenna prothorace vix longiores, apicem versus mouiliformes et leviter incrassatse, articulo primo 

 longiusculo flexuoso, secmido breviusculo, tertio paulo longiore, ultimo subovato. Labrum trans- 

 versum, antice rotundatum pilosum. Mandibula validae cornese ; in foemina ad apicem bifidse et 

 in medio leviter sinuatse ; in mare longissimee robustae porrectse, ad apicem reflexEe acutae integrse 

 (margine interno crenulato), ad basin dente magno transverso bifido instructs. Maxillce bilobse, 

 lobis pubescentibus, inferno parvo acutiusculo. Palpi subclavati; mawillares articulo primo 

 parvo, secundo et tertio majoribus crassioribus (hoc breviore), ultimo elongate subsecuriformi- 

 ovato ; labiales articulo primo parvo, secundo paulo majore, ultimo elongato subfusiformi apice 

 oblique truncato. Mentum transversum, antice leviter emarginatum. Liffula submembranacea, 

 antice cihata et vix Integra. Pedes mediocres: tibiis subtilissime pubescentibus, ad apicem 

 externum subtruncatis, per marginem exteriorem obscurissime subcrenulatis : tarsis heteromens ; 

 anticis articulis primo et secundo subtus productis ; posterioribus (sed prsesertim posticis) articulo 

 primo longiuscxilo. 



In their habits, size, and colouring, the present genus and Tribolhmi are nearly 

 coincident ; nevertheless the former may be at once recognised from the latter (in 

 which, unlike Cerandria, the sexes are similar) by its longer and less clavate 

 antennse, more convex and anteriorly dUated prothorax, by its somewhat more 

 shining surface, punctate-striated elytra and narrower fore-tibise, and by the struc- 

 ture of the first two joints of its fr-ont feet (which are produced, or acuminated, 

 beneath), — whilst the enormous development and recurvation, not only of the 

 mandibles, but also of the lateral edges of the clypeus, of the males, in conjunction 

 with the corneous processes on the hinder portion of their forehead, will prevent 

 the possibility of confounding them at aU events with anything else. Like so 



3 R 



