538 Transactions Smith African Philosophical Society, [vol. xiii. 



This genus is very closely allied to Rhagopteryx, Burm., which 

 was thought at one time to inhabit Java, but is a native of the West 

 Coast of Africa (Cameroon s). 



Mtbmecochilus marchalli, Wasm., 



Plate XLYIL, fig. 11, 11a. 



Illustr. Zeitschr. f. Entom., p. 84, v., figs. 4, 4a. 



Black, opaque, with the whole head, a very broad marginal band 

 on the prothorax, the whole of the deflexed part of the elytra as well 

 as the posterior declivity, the sides of the pygidium and of the 

 abdominal segments, and the pectus clothed with silvery-white 

 contiguous appressed scales ; clypeus and head covered with con- 

 tiguous round punctures ; prothorax plainly shagi'eened, slightly 

 impressed longitudinally in the centre of the posterior part ; 

 scutellum longitudinally strigillate ; elytra with the suture raised, 

 the space between the latter and the punctate, rounded dorsal costa, 

 which projects considerably beyond the apical part, has three 

 geminate fine striae with the intervals finely strigillate trans- 

 versely ; pygidium closely punctulate, the knobby part smooth ; 

 abdomen and pectus closely cicatricose punctate, legs quite smooth, 

 glabrous. 



Length 13 mm. ; width 5 mm. 



This species has been found by Mr. G. A. K. Marshall entering 

 the formicarium of Plagiolepis custodiens, Sm. 



Hab. Southern Bhodesia (Salisbury, Mtokos, Bulawayo, 

 Sebakwe). 



Gen. TROGODES, Westw., 

 Thesaur. Entomol., p. 30. 

 Mentum sub-quadrate, plane, ligular part strongly swollen on the 

 outer face at about the centre, and sloping thence to the anterior 

 part which is rounded laterally, broader than across the base and 

 slightly sinuate, the swollen central part of the ligula is densely 

 hairy, the hairs very Long; last joint of labial and maxillary palpi 

 elongated, slightly curved outwardly : upper and inner lobe of 

 maxillae armed with a robust tooth slightly curved at the tip, and 

 of nearly equal length, the outer part of the former is slightly villose, 

 the inner margin somewhat pubescent ; head simple, clypeus 

 slightly narrowed laterally in front, plane, slightly impressed on 

 each side at the apex the margin of which is strongly reflexed 

 in the centre ; prothorax roundly ampliated laterally in the centre, 

 nearly equally attenuate in front and behind, and without any trace- 



