POMPILUS. 149 



d. Wings hyaline, witli a siibapical fuscous cloud 

 or bar. 



a'. Head, thorax, and abdomen black P. mactilipes, p. 155. 



b'. Head and thorax black, abdomen fer- 

 ruginous . . P. mitts, p. 155. 



B. Wings fiavo-hyaline. 



a. Fore wing with a subapical fuscous fascia .... P. dehliensis, 



b. Fore wing with a fuscous margin at apex. [p. 156. 

 a'. Head, thorax, and abdomen black ; the 



abdomen with grey pruinose bands. 

 a-. Fore wing with the 3rd cubital cell 



petiolate P. incognitus, p. 156. 



b'^. Fore wing with the 3rd cubital cell not 

 petiolate. 

 a^. Median segment posteriorly striate on 



the sides P. liicidulus, p 156. 



b^. Median segment posteriorly not striate. 



a*. Posterior femora and tibiae black . . P. rothrieyi, p. 169. 

 A*. Posterior femora and tibite ferru- 

 ginous P. pedestris, p. 169. 



b'. Head, thorax, and abdomen variegated with 

 3'ellow and fulvous red. 

 or. With only underside of antennae fulvous 



red ; mesonotum black, immaculate . . P. orientalis, p. 157. 

 b-. Abdomen also mai'ked with fulvous red. 



a'. Mesonotum black, with a V-shaped [p. 158. 



yellow mark P. mtdtipictus, 



f • b^. Mesonotum fulvous or ferruginous red, 



immaculate P. infestus, p. 158. 



C. Wings fusco-hyaline. 



a. Thorax black. 



a . Abdomen black with silvery pile P. ariadiie, p. 159. 



b'. Abdomen red and black P. rejleatis, p. 159. 



c'. Abdomen black with bands of grey pile. 



a-. Posterior tibiae with a white spot at base [p. 160, 



above P. leucophtsus, 



b"^. Posterior tibiae without any white spot . . P. limbatm, p. 160. 



b. Thorax fex'ruginous red and black. 



a' Mesonotum red. [p. 160. 



cr. Head black P. ephippiatus, 



b'-'. Head red P. lascivus, p. 161. 



b' . Mesonotum red marked with black P. vitiostis, p. 161. 



c'. Mesonotum black. 



a^. Abdomen red and black P. zebra, p. 162. 



b"^. Abdomen wholly black P. comptus, p. 162. 



D. Wings dark fuscous. 



a. Wings with lacteoua white markings. [p. 172. 

 a'. Thorax black P. myrmeeoides, 



b'. Thorax red P. lusciusus, p. 1 73. 



b. Wings entirely dark fuscous. 

 a'. Abdomen black and red. 



a^. Pronotum black. 



a^. Median segment truncate at apex .... P. mccstus, p. 163. 



&■'. Median segment rounded at apex .... P. atripes, p. 163. 



e^. Median segment emarginate with the 



sides produced posteriorly P. pedalis, p. 163. 



b^. Pronotum black witli a yellow fascia. ... P. beatus, p. 164. 



