neic genera and species of Tenebrionidce. 267 



terlzed this gemis, which he places AA^ith the Ulomides, 

 near Alphitobius. I have before me an example out of 

 the Dejeanean collection, which perfectly accords with 

 Lacordaire's description, as far as it goes ; but when he 

 gives " Les autres caracteres et le facies comme chez les 

 Alphitobius,'' it proves that he had not sufficiently ex- 

 amined his insect. The genus has really the most intimate 

 relationship with Diphgrhg7ichus, Fairmaive; and although 

 preserving certain characters that seem to ally it to Alphi- 

 tobius, must, by its large and prominent eyes, its externally 

 widely open mesocoxal cavities and exposed trochantins, 

 belong, without doubt, to the Diaperides. Besides the 

 characters given by Lacordaire, as differentiating the genus 

 from Alphitobius, il has the antenna elongate, slender, 

 scarcely perceptibly compressed, the outer joints gradually 

 larger and perfoliate, joints 2-10 obconic, 11 large, ovoid: 

 mentum small, disc strongly convex and carinate down the 

 centre, sides curvedly contracted anteriorly and somewhat 

 inflexed, apex broadly emarginate : last joint of maxillary 

 palpi secin-iform, the apical angle a little produced:* pro- 

 sternal process declivous and broadly lanceolate behind, 

 the tip slightly recurved : viesosternum less horizontal 

 above, less vertical and less deeply excavated in front : 

 prothorax slightly but distinctly sinuous at base and apex, 

 the angles not at all prominent : elytra tiimcate at base, 

 the epipleural fold strongly narrowed behind and not 

 nearly attaining the apex of the elytra. Diphyrhynchus 

 may be distinguished from Heierocheira by having the 

 eyes smaller, less prominent, and emarginate in front ; the 

 notch in the epistoma deeper and more angular ; the an- 

 tenna3 stouter, the joints shorter, scarcely perceptibly per- 

 foliate, the outer five joints distinctly larger and broader, 

 the 1 Itli suborbicular ; the prothorax arcuately emarginate 

 in fi'ont ; the metasternum shorter ; the prosternal process 

 horizontal and more produced and pointed behind ; the 

 mesosternum more })rominent, more vertical and more 

 deeply excavated in front ; the tibije more robust, the four 

 posterior elongate-triangular ; and the epistoma of the $ 

 produced in front at each side into a broad slightly re- 

 curved horn. In both genera the four first joints of the 



* Lacordaire, 1. c. p. 334, note (1), disputes Mulsant's definition of the 

 form of the last joint of the palpi in Alphitobius. My own examinations 

 confirm Mulsant's: I find the last joint of the labial palpi to be sub- 

 cylindric and truncate at tip, that of the maxillary oblong-oval and ob- 

 liquely truncate at apex. 



