234 Memoirs on the Coleoptera 



the prothorax "antice gradatim modice angustato" must be quite 

 different, the sides, except at base, in panamensis being parallel 

 and very evenly arcuate from the basal sinus to the apec. The 

 species described above as obliqua, is well distinguished from hicolor, 

 not only by the materially larger size, but by the form of the anterior 

 male tarsi, the third joint being much smaller than the second in 

 hicolor and iowensis, but exactly equal to the third in obliqua. 

 Thoracica Chev., from Mexico, is possibly not identical with the 

 West Indian ruficollis {erythrodera) , which would render valid 

 the name caseyi, substituted for thoracica Csy., by Leng. 



Loxopeza Chd. 

 This is another genus in which the joints of the anterior male 

 tarsi are asymmetric, though to a very slight degree when compared 

 with the preceding genus, and in some cases the tarsus must be 

 viewed carefully to recognize the obliquity of the joints at all. 

 Nevertheless, I believe that Loxopeza should be maintained as 

 distinct from Lebia; in Lebia pleuritica and enormis, having appar- 

 ently symmetric tarsi, the peculiar habitus of Loxopeza is repro- 

 duced, and I therefore think that these two species should be 

 regarded as Loxopeza rather than Lebia. The three basal antennal 

 joints and a clearly marked basal node of the fourth are glabrous 

 as in Platyninae. The ten species in my collection, which, at any 

 rate, I prefer to record as Loxopeza, may be distinguished readily 

 as follows : 



Fourth joint of the hind tarsi deeply emarginate 2 



Fourth joint feebly emarginate 5 



2 — Head black. Body moderately convex and ventricose, strongly 

 shining, pale rufo-flavate, the head black but with pale epistoma, 

 labrum and mandibles, the elytra bright steel-green, the epipleura 

 and abdomen piceous; head four-fifths as wide as the prothorax, 

 with large and rather prominent eyes, the front finely and feebly 

 rugulose; antennae slender, fusco-testaceous, clearer basally; pro- 

 thorax four-fifths wider than long, widest before the middle, the 

 sides straight basally, the angles more than right but only slightly 

 blunt; surface feebly rugulose, very broadly reflexed and smoother 

 at the sides, the anterior impression obsolete, the posterior straight 

 and deep near the base and through half the width; elytra oblong, a 

 third longer than wide, twice as wide as the prothorax, rapidly 

 narrowing at apex, the external angle of the truncature rounded; 

 striae very deeply and conspicuously impressed, the micro-punctu- 

 lation scarcely discoverable, the seventh and eighth fine and not 



