816 ME. E. A. ELLIOTT ON THE 



21. BREviPETiOLATUS Enclerl. 



Stephanus hrevipetiolaUis Enderl. (1), p. 205, $ . Dia- 

 stejyhanus b. Enderl. (2), p. 475. 



5 . Head small ; frons finely arcuate rugose ; anterior 

 tubercle very long and pointed, the four others indistinct. 

 Vertex coarsely transrugose ; occiput finely and closely punctate, 

 slightly rugose ; posterior margin of head bordered. First and 

 second flagellar joints of equal length, third and fourth also 

 equal, and twice as long as first. Pronotum smooth and dull. 

 Mesonotum irregularly transrugose ; scutellum centrally dull, 

 not punctate, the anteriorly convergent rows of punctvires deep. 

 Meso- and meta-pleurse and median segment finely alutaceous, 

 latter not separated from metapleui-se. Petiole dull, only apically 

 sub -transrugose, stout, clavate, and only half as long as remainder 

 of abdomen. Terebra as long as body, spicula yellow, sheaths 

 brown. Hind coxse finely trans-striate. 



Black ; frons, vertex, and apex of mandibles black ; remainder 

 of head, four basal antennal joints, and band at base of third 

 segment ferruginous ; legs ferruginous, femora basally and above 

 and hind tibiae centrally black. "Wings hyaline, nervures pale 

 brown. 



Length 8 mm. 



Habitat: Johann Albrechtshohe, JSIorth Cameroons. L. Con- 

 radt. 



The unusually short and stout petiole, together with the dull 

 pronotum and scutellum, distinguish this species from all others. 



The group of species, including D. schlettereri, togoensis and its 

 var. fasciatus, flavomacidatus, and hrevipetiolatus, all from Johann 

 Albrechtshohe, have much in common, and r-equire further 

 elucidation. 



22. TRILOBATUS Elliott. 



Diastephanus trilohatus Elliott (3), p. 32, $ . 



5 . Frons and vertex extremely finely, occiput more coarsely 

 trans-striate ; posterior margin of head very finely bordered. 

 Scape slightly longer than cheeks. First and second flagellar 

 joints of equal length, third about as long as first and second 

 together. Pronotum transrugose, apically coarsely, basally more 

 finely, with extreme base smooth; mesonotum and scutellum 

 smooth, with a few coarse punctures ; mesopleurae smooth above, 

 punctate below; metapleurse cribrate punctate ; median segment 

 coarsely and irregularly punctate. Petiole shorter than rest of 

 abdomen, finely trans-striate, remaining segments smooth. 

 Terebra very slightly longer than body, sheaths black. Hind 

 coxae basally punctate, remainder trans-striate; femora bidentate; 

 tibiae compressed to beyond middle. 



Black ; head beneath, inner orbits, and frons flavous ; the 



