the genus Odynerus occurring in the Ethiopian Region. 507 



0. (Lionotus) dimorphus, sp. n. 



$. Niger, aurantiacus ; antennis basi ac infra, mandibulis, clypeo, 

 macula supraclypeali, sinu oculorum, macula lineari post oculos, 

 pronoto, maculis mesopleuris, tegulis, scutello, postscutello, segmenti 

 mediani lateribus plerumque, abdominis segmento primo, secundo 

 plerumque, fasciaque apicali tertio, aurantiacis; pedibus (coxis 

 trochanteribusque exceptis) aurantiacis; alis fuscis. Long. 9 mm. 



Gracilis, differt scutello bituberculato, non piano ut in $, 

 clypeoque apice emarginato ; coloribus similis, sed fiagello ; omnino 

 nigro. Long. 8 mm. 



Sparingly clothed with pale pubescence. Clypeus rather longer 

 than broad, pyriform ; the apex truncate ($) distinctly emarginate 

 with acute lateral teeth (cJ); mandibles normal; a distinct pit on 

 the vertex behind ocelli ($); pronotum truncate anteriorly, the 

 lateral angles not very acute ; sides of pronotum widening towards 

 tegulae. Scutellum raised, but flat ($), postscutellum with sharp 

 lateral tubercles; median segment concave, the sides rounded. 



First segment of abdomen slender at base, second segment 

 distinctly constricted basally, the black marks on its dorsal surface 

 large, bilobed in shape, the sides orange. 



Whole insect punctured; clypeus ($) and mesonotum with striate 

 punctate, abdomen more finely punctured, the apical margins of 

 the tergites more coarsely punctured than the remainder. Wings 

 fuscous. 



Length 9 mm. (?), 8 mm. (^). 2 ?, 1 (J. 



Orange Free State: Bothaville, iii. 1899 {Dr. H. 

 Brauns) ; German S.W. Africa. 



0. (Lionotus) asmarensis (Schulthess), Soc. Entomolog. 

 xxix, p. 63 (1914). 



This was described by Schulthess as a variety of 0. 

 silaensis, Sauss. ; it is, however, quite distinct. 



0. [Lionotus) sjostedti, Cam. 



0. yngvei, Cam., described at the same time and from 

 the same type locality as 0. sjostedti, is certainly the male 

 of that species. Cameron (Sjostedt's Kilimandjaro-Meru 

 Exped., p. 188, 1910) had considered this possibility; his 

 reasons for separating them do not appear satisfactory. 



0. (Lionotus) arethusae, sp. n. 



c^. Niger, luteo fasciatus; scapo infra, clypeo, macula supra- 

 clypeali, sinu oculorum infra, macula post oculos, pronoto antice, 



