700 COLEOPTEEA COLLECTED IX EAST AFR ICA-LINELL. vot.xvni. 



PRAOGENA SUBVIRIDIS, new species. 

 Elong-ate oval, reddish brown, very shiuing. Antennae somewhat 

 longer thau half tlie body, liliform, opaque toward apex. Head flat 

 hnely punctate; clypeus transverse, truncate at apex, separated from 

 thetront by a finely impressed straight line; front between the eyes 

 broader than diameter of eye seen from above; ocular sulci parallel 

 narrow, deep, reaching- from middle of eye to the clypeal suture' 

 Thorax one-half broader than long, shining- black, evenly convex 

 finely and sparsely punctate; apex truncate; sides broadly rounded • 

 anterior angles strongly rounded; posterior angles obtusely rectan' 

 gnlar ; base slightly bisinuate, finely margined with a small round fovea 

 each side. Elytra much broader than thorax, greenish brown, stn.no-lv 

 convex, subparallel for three-fourths of the length, strongly puncta'^o- 

 striate; intervals slightly convex at base, more so toward the apex 

 obsoletely punctulate. Ventral surface nearly smooth. Prosteriium 

 arcuate, conically produced posteriorly. Legs sparsely punctate 

 uniform in color. ' 



Type.-:S,o. 43, U.S.N.M. One example, Tana River. Length, L5 mm. 

 MYLABRIS ATRICORNIS, new species. 



Antenme entirely black. Elytra with basal half yellow; a narrow 

 ba^sal margin, a triangular spot including the scutellum, a round spot 

 behind the humeral umbone and a smaller one between this spot and 

 the suture, black; apical half black, with a tran verse band at apic-il 

 third, composed of two confiuent spots, and a small transverse apical 

 spot, yellow. Otherwise as in Mylahris ffariconiis Fabricius 



Type.-:<lo. 44, U.S.KM. One example. Tana River. Length, LS nmi. 



MYLABRIS UNICINCTA, new species. 



Elong;ate, deep black; antennaj yellow, with first joint black and 

 second brown; elytra black, with a sharply limited 'elevated vellow 

 median band of uniform width (2.2 mm.) from margin to margin 

 Otherwise as in Alijlahris flavkornls of Fabricius. 



Type.-^o. 45, U.S.N.M. One example, Tana River. Length, 23 mm. 



THYLACITES TANA, new species. 



Elongate, mottled with grayish white and brownish rounded scales 

 sparsely mixed with short gray hairs. Antenn* short, spar.ely cov- 

 ered with long grayish hairs, second and third joint e.jual, shortly 

 obconical, only slightly longer than the following, seventh joint sub- 

 contiguous to the club, which is oval, acuminate, densely clothed with 

 short whitish appressed pubescence. Eyes round, verv prominent. 

 A deep frontal sulcus reaching from vertex to middle of rostrum, which 

 IS attenuate toward apex, flat above, carinate at sides. A short deep 

 sulcus outside the carina, in front of and above the eyes. Antennal 

 grooves very deep, narrow at tip, strongly arcuate and widened toward 



