CETONIIN/E 381 



with fine close rugiform sculpture ( 9 ) ; antennal club slender, 

 as long as the stem, shorter in the female; prothorax large, fully a 

 fourth wider than long, opaque velvety-black, the entire periphery 

 with yellow tomentum, the discal reversed delta discontinuous 

 posteriorly at the middle; sides parallel and feebly arcuate to beyond 

 the middle, there becoming oblique to the obtuse and rounded angles, 

 the apex sinuate; base broadly lobed; scutellum opaque, black, with 

 two triangular spots of tomentum bearing minute hairs, like those 

 of the pronotal tomentum; elytra about as long as wide, parallel and 

 strongly arcuate at the sides, fully a fifth to nearly a third wider than 

 the prothorax, glabrous, rufous in color, variegated with black, the 

 principal dark spots being one oblique externally near the base, 

 another triangular near the sides just behind the middle, also the 

 apex, prolonged anteriorly near the suture for a short distance; 

 punctures small, arranged in a few impressed series, the sutural 

 interval basally having a narrow vitta of pale tomentum; pygidium 

 with rather long, decumbent and somewhat dense golden hair, feebly 

 convex, as long as wide ( 9 ) to longer and narrower (cf); abdomen 

 with the first four segments short, the fifth as long as the three or 

 four preceding combined; hind femora swollen and peculiarly bent, 

 the hind tarsi more than twice as long as the tibiae (cf ), or with the 

 hind femora straight and unmodified and the tarsi three-fourths 

 longer than the tibiae (9). Length 7.8 -10.0 mm.; width 4.5-5.6 

 mm. North Carolina to Florida, Louisiana and Texas. Twenty- 

 seven examples. [Scarab, delta Forst.] delta Forst. 



The complex ornamentation and striking sexual differences 

 require a rather long description in order to be made known properly. 

 There are some slight differences between the specimens from North 

 Carolina and those from Florida and the Gulf coast, but further 

 investigation in this direction is deferred. The male in delta is 

 about three times as abundant as the female in the series at hand. 

 Trigonopeltastes is more widely separated from Trichiotinus than 

 might be inferred from the definition in the table, the structure of 

 the abdomen, for instance, being radically different, and this 

 distinguishes it also from Roplisd, where the abdomen is more 

 normal, the fifth segment being barely as long as the two preceding 

 combined. Roplisa is however very much closer to Trigonopeltastes 

 and the European Trichius, than it is to Trichiotinus. 



Trichiotinus n. gen. 



Besides the obvious structural differences in the elytra and the 

 much longer tarsi, the species of this genus can be distinguished 

 at once from the European Trichius by their general habitus. The 



