February, IRTS.] 201 



j 

 NOTES ON HETEROMERA, AND DESCRIPTIONS OF NEW GENERA 

 AND SPECIES (No. 5). 



BY F. BATES. 



ULOMIMIMUS, nov. gen. 

 At once to be distinguisliecl from Aiitlmachus and Ulovia by tlie 

 anterior tarsi being dilated and clotbed beneath with a brush of dense, 

 short hairs, the penultimate joint much smaller than the preceding ; and 

 by the anterior tibise being strongly triangularly dilated, and furrowed 

 above for the reception of the tarsi in repose. Mentum cordiform, 

 densely pilose ; last joint of labial palpi elongate-oval, slightly 

 attenuate at apex, that of the maxillary elongate-triangular, and 

 obliquely truncate at apex ; antennge short, joint 3 longer than the 

 following, 5 — 10 more or less transverse, perfoliate, equal at each side 

 of the antennal axis, the 11th very large, rounded; head immersed in the 

 prothorax to the hind margin of the eyes, nearly concealing the neck ; 

 labrum strongly transverse, slightly emarginate in front, the angles 

 rounded ; epistoma produced beyond the level of the insertion of the 

 antennae, emarginate in front, the angles rounded, the suture well 

 marked by an impressed line angular at the sides ; prothorax a little 

 wider than long, moderately convex, sides rather sharply contracted 

 in front, widest before the middle, thence gradually narrowed to the 

 base, apex rather strongly (and slightly sinuously) emarginate, front 

 angles prominent, base almost squarely truncated, the hind angles 

 forming obtuse angles, faintly margined at the base and apex (obso- 

 letely so at the middle of the latter), more strongly at the sides, 

 without pit or excavation anteriorly ; scutellum large, triangular, 

 the sides sinuous ; elytra but little wider at the base than the base of 

 the prothorax, moderately convex, sub-parallel, base slightly emargi- 

 nate, humeral angle distinct ; epipleural fold entire, but very narrow 

 behind ; legs robust, the four posterior femora compressed ; tibias 

 strongly compressed, the anterior strongly and sinuously dilated from 

 near the base to the apex — which is four times the width of the base ; 

 superiorly, at the inner side, channelled for the reception of the tarsi 

 in repose, the apical half densely pilose within, the outer margin 

 entire {i. e., neither dentate nor serrate), longitudinally keeled on the 

 under face, the keel raised up in the middle into a broad pointed 

 tooth, exterior to this keel the under-surfaee is studded with short, 

 spine-like teeth, which, close beneath the margin — both lateral and 

 apical — are equidistantly ranged in line ; the four hind tibia; are 

 triangular, the outer apical angle produced ; excepting at base and 

 apex, they ai'e closely and coarsely punctured and hispid, inner margin 



