the genus Odynerus occurritig in the Ethiopian Region. 497 



121. (126) Colour mostly black ; thorax mostly black or black with 



extensive yellow or ferruginous markings. 



122. (123) Median segment concave, coarsely trans-striate, later- 



ally subtuberculate ; thorax almost entirely black. 

 Abdomen almost impunctate. 



\4:-7naculatus, Schulthess. 



123. (122) Median segment svxboblique, rounded, evenly punctured. 



Prothorax ferruginous or yellow. 



124. (125) Prothorax ferruginous red; all the abdominal segments 



black, with interrupted yellow fasciae. 



schuUhessi, sp. n. 



125. (124) Prothorax yellow; abdominal tergites 5 and 6 red. 



wellmani, M. -Waldo. 



126. (121) Mostly ferruginous, prothorax and postscutellum yellow. 



aequinoctialis, Sauss. 

 (Here come in O. erythrotomus, Cam., and O. meruensis, 

 Cam.) 



127. (112) Clypeus with the apex truncate. 



128. (133) Postscutellum above a small transverse carina. 



129. (132) Species with considerable black markings. 



130. (131) Clypeus almost impunctate. Length 12| mm. 



spoliatus, Cam. 



131. (130) Clypeus distinctly punctured. Length 10 mm. 



indecorus, Cam. 



132. (129) Species without any black markings; ferruginous, with 



pronotum anteriorly and abdominal segments 1 and 2 



bordered with yellow mutahilis, Sauss. 



{0. falcatus, Tullgren, comes in here.) 



133. (128) Postscutellum without any transverse carina. 



134. (137) Abdomen impunctate. 



135. (136) Clypeus (?) yellow, impunctate, postscutellum and 



median segment yellow. . . . hellahdus, Sauss. 



136. (135) Clypeus (?) red, punctured; abdomen without any 



yellow markings rotundiscutis. Cam. 



137. (134) Abdomen more or less punctured. 



138. (139) Clypeus entirely yellow ((^ $) as broad as long, scutelhim 



(9 specimens) ferruginous. . . . liarrarensis, sji. n. 



139. (138) Clypeus ($) basally yellow, distinctly longer than broad; 



scutellum (12 specimens) with some yellow. 



shefjieldi, sp. n. 

 (Here come in 0. inacrocephalus, Grib., 0. multicolor, 

 Sauss., O. fnutans, Saviss.) 



140. (68) Median segment with a distinct dorsal surface posterior 



to postscutellum (div. Stenodynerus). 



