CAMERON, FOSSOBE8. 283 



hyaline, tinged with violaceous, the uervures black; the apex of radius largely projecting 

 beyond the posterior part of the 2nd transverse cubital nervure, rounded; there are only 

 2 transverse cubital nervures; the recurrent nervures received shortly before the middle 

 of the cellule; middle of front bordered by roundly curved keels which unite immediately 

 behind the ocellus; from near Hie base of the area thus formed a keel runs on the 

 outerside to shortly beyond the middle; inside Ibis is an other and similar keel, com- 

 mencing shortly behind Ihe middle. Apex of clypeus broadly rounded, not keeled. 

 Mandibles black. Basal half of pronotum strongly transversely striated; a distinct, not 

 very broad, furrow down the centre, the apical part sparsely, distinctly punctured. Meso- 

 notum sparsely punctured, the parapsidal furrows wide, with clearly separated transverse 

 keels; the basal half of the sides strongly closely punctured. Base of scutellum weakly, 

 the apex somewhat more strongly punctured. Post-scutellum opaque, coarsely aciculated, 

 sparsely punctured laterally. Metanotum transversely striated, more strongly and widely 

 in the centre than elsewhere; the central keel is straight; those bordering it oblique and 

 uniting at the apex, forming a triangular area; the apical small area obliquely narrowed 

 at the base and with a keel down the centre ; its apex broader and rounded ; the lateral 

 teeth broad, the part behind them roundly narrowed; the apical slope has 3 keels down 

 the centre, the lateral uniting at the apex, the outerside irregularly areolated. Pleura? 

 distinctly, sparsely, but not strongly punctured. Abdomen distinctly, but not very closely 

 nor strongly punctured; the apex more strongly and closely than the rest. Claws with 

 a stout, somewhat triangular tooth behind the middle; the apex of the joints spinose; 

 the 3rd in the centre half the length of the 2nd. tf. - - Length 13 mm. 



Usambara: Mombo. June. 



Occiput broadly, roundly narrowed. Apex of vertex slightly depressed, irregularly 

 striated, the stria? uniting in front. The posterior tibia? are much more closely and 

 strongly punctured than the others. Penultimate tarsal joint more than half the length 

 of the last. 



Comes near A. assim-ilis, KOHL. 



Tachytes testaceinerva, sp. nov. 



Black, the legs rufo-testaceous, all the coxa? and trochanters, the anterior and 

 posterior femora to near the middle except above and the middle pair entirely to near 

 the apex, black; the palpi testaceous, the base of the mandibles rufo-testaceous and cov- 

 ered witb a silvery pubescence; wings hyaline, a little tinged with fulvous, the nervures 

 rufo-testaceous, the 2nd abscissa of radius about one fourth shorter than the 3rd, and 

 shorter than the space bounded by the recurrent nervures, the apical of which is re- 

 ceived shortly beyond the middle of the cellule. Eyes above separated by the length of 

 the 3rd antennal joint, which is not much longer than the 4-th. Head, thorax and base 

 of abdomen densely covered with pale fulvous pubescence; the apices of the abdominal 

 segment with silvery white bands of depressed pile; the pygidium covered with stiff rufous 

 pubescence. $. - - Length 17 mm. 



