146 MEMOIRS ON THE COLEOPTERA 



(Dolosota), but with the elytra large and well developed, their flanks 

 extending posteriorly a little further than the sublateral parts of 

 the apices, the latter therefore feebly flexed posteriorly at the sides 

 though not properly sinuate; the first three tergites are strongly 

 impressed and are much shorter than either the fourth or fifth, 

 the latter being well developed and always more closely asperate 

 than those more anterior. The eyes are very large, the infra-lateral 

 carinae distinct and the antennae small and strongly incrassate, 

 the middle coxae contiguous, the mesosternal process moderately 

 short and acute, the metasternum transverse behind the coxae and 

 the sunken longitudinal ridge very acute. The hypomera are 

 horizontal and feebly warped as in Dimetrota. The following may 

 be regarded as the type: 



Nosora azteca n. sp. Rather convex, very strongly shining through- 

 out, black, the elytra not paler, the abdominal apex slightly pale, the 

 legs slender, very pale; punctures fine and rather sparse throughout 

 except on the fifth and sixth tergites, where they become close and 

 strongly asperate, also slightly asperate on the other tergites except in 

 the very smooth basal regions; pubescence short, decumbent, dusky and 

 inconspicuous; head wider than long, two-thirds as wide as the prothorax, 

 the eyes very large and prominent, the tempora less than half as long and 

 rapidly converging to the base, the carinae entire; antenna? very short, 

 piceous, the four basal joints pale, the first but little longer than the 

 second, third still a little shorter, obconic, the fourth scarcely thicker, 

 slightly transverse, five and following somewhat abruptly wider and 

 increasing rapidly in width, all strongly transverse, the tenth more than 

 twice as wide as long, the last ogival and longer than the two preceding; 

 prothorax short, slightly less than twice as wide as long, widest near the 

 broadly and strongly rounded base, the sides thence slightly converging 

 and strongly rounded to the apex, unimpressed; elytra slightly trans- 

 verse, with feebly diverging sides, at base just visibly wider, the suture 

 about two-fifths longer, than the prothorax; abdomen parallel, with 

 straight sides, distinctly narrower than the elytra; tarsi moderate, the 

 first four joints of the posterior equal. Length 1.6-2.0 mm.; width 

 0.38-0.5 mm. Mexico (Cuernavaca), Wickham. 



To be known at once by its shining black integuments, very short 

 antennae, large eyes and short transverse prothorax. The following 

 differs greatly in color but is similar in all of its structural characters, 

 except that the metasternum behind the coxae, instead of being 

 perfectly even and transverse, has a feeble median arcuation: 



Nosora meticola n. sp. Form, lustre and sculpture nearly as in the 

 preceding but rather less convex, the abdomen also with finer and less 



