420 Annals of the South African Museum. 



flagelliform ; on the contrary it is slightly clubbed, exactly as in the 

 true Batrisus. Orropygia also resembles Nanmnia from Smyrna, 

 which is likewise myrmecophilous, but in this genus the abdomen has 

 an entire, strongly indicated lateral margin, and the mesosternum is 

 truncate between the hind coxae which are widely distant. On that 

 account the two genera have to be broadly separated. 



Orbopygia myrmeoophila, n. sp. 



Dark reddish brown, with the elytra and legs lighter, shiny, briefly 

 not thickly fulvous pubescent ; head and prothorax covered with 

 a strong, rough, closely set punctuation which is stronger and more 

 ocellate on the prothorax ; elytra with sparse, somewhat strong 

 setiform punctures ; the punctures on the abdomen are finer. Head 

 hardly as long as broad, anterior angles projecting but rounded and 

 flattened; frons transversely impressed between the angles some- 

 what behind, convex and declivous between the antennae ; sides 

 slightly sinuate, tempora much rounded, two broad but shallow 

 fossae behind the centre, occiput and vertex not distinctly carinate. 

 Antennae long and robust ; joint 1 robust, 2 not much longer than 

 wide, 3-6 very slightly obconical, much longer than broad and 

 slightly increased in length, 7 equal to 4, 8 cylindrical and shorter, 

 9-10 of equal length but slightly thicker and obconical, 11 longer, 

 fusiform. Prothorax longer than broad, strongly angulate on the 

 sides before the median part, the sides and the anterior part forming 

 a single curve ; from the angle to the base the sides are slightly 

 arcuate inwardly, on each side is a strong fossa and traces of a 

 longitudinal furrow ; a very faint transverse depression unite the 

 two lateral fossae with a not well-marked median one. Elytra 

 moderately elongated, regularly narrowed towards the base, shoulders 

 almost obsolete but indistinctly carinate, 3 basal fossae, dorsal stria 

 shortened in the anterior third part of its length. Abdomen longer 

 than the elytra, conical ; tergites decreasing gradually, the first pro- 

 vided in the centre of its hind edge with a long and robust horizontal 

 spine extending as far as the anterior half of the 2nd tergite, ultimate 

 tergite visible, truncate at apex ; sternites of the same size as the 

 tergites, the first flattened and more rounded at apex. Metasternum 

 with a deep, central furrow. Femora strongly fusiform ; tibiae nearly 

 straight, gradually and very slightly thickening towards the apex. 



Length 3 mm. 



No sexual characters other than the spine of the first abdominal 

 tergite — which is undoubtedly the appendage of the male — is to be 

 detected. 



