496 Mr. G. Meade- Waldo's revision of the species of 



105. (106) Colours entirely ferruginous ; clypeus, thorax partly and 



abdominal segments 1-3 with narrow apical fasciae. 



comhustiis. Smith. 



106. (105) Colours black, ferruginous and yellow ; all the abdominal 



segments with yellow apical fasciae. 



curvirufolmeatus, Cam. 



107. (104) Abdomen punctate only on the apical margin of tergites. 



108. (109) Tergites 2-6 with apical margins coarsely punctured, 



tergite 2 with a pale narrow apical fascia ; clypeus not 

 apically emarginate ; dark ferruginous and black insect. 



marginipunctatus, sp. n. 



109. (108) Tergites 1-6 with punctate apical margins, head and 



thorax black with yellow markings ; abdominal segment 

 1 black, 2-6 black and yellow; clypeus with broad, 

 round emargination, with sharp teeth at sides. 



bothriogaster, Schletterer. 



110. (97) Wholly black; postscutellum sometimes yellow. 



aureosericeus, sp. n. 



111. (87) Abdominal segments 1 and 2, or one of them, with con- 



spicuous lateral spots, sometimes more or less confluent 

 above, and apical fascia on tergite 2 sometimes much 

 dilated laterally ; general fascies variable, ferruginous 

 and yellow or black and yellow. 



112. (127) Clypeus with the apex emarginate; the emargination 



either round and broad with lateral teeth or indistinct, 

 formed by the approximation of two small apical teeth. 



113. (120) Emargination at apex of clypeus round and broad. 



114. (115) Sides of median segment forming tubercles; abdominal 



segments ferruginous and black with yellow spots. 



stiraspis, Cam. 



115. (114) Sides of median segment rounded, abdomen yellow and 



black or ferruginous and black; clypeus yellow or 

 ferruginous ((^). 



116. (117) Abdomen yellow and black, no ferruginous; clypeus 



ferruginous (c^) scripticeps, Cam. 



117. (116) Abdomen ferruginous and black, with yellow apical 



fasciae. 



118. (119) All the tergites with yellow apical fasciae. Length 



10 mm simplidentatus, M. -Waldo. 



119. (118) Tergites 1 and 2 only with narrow apical fasciae. Length 



7 mm stellaboschensis, Cam. 



120. (113) Emargination at apex of clypeus formed by the approxi- 



mation of two small apical teeth. 

 (Here comes in 0. aethiopicus, Sauss.) 



