LATUYKOPIITHALMUS. 79 



13 (12) Wing-veins and costa entirely yellow ; 



abdomen of the female narrowly yel- 

 low on the sides ; white abdominal 

 bands broad, pure white, and very con- 

 spicuous; black peristomal stripe 

 usually not distinct ; venter yellowish 

 grey, unspotted var. tabanoides, Jaenn. 



14 (11) Face* without black stripes, the middle 



tubercle being yellow ; peristoma 

 rather broad and more prominent ; 

 pterostigma with a basal and also 

 an apical brown spot; scutelluui with 

 black hairs in the middle. 



15 (22) Second abdominal segment without a 



black band on the fore border, or with 

 a very small one ; first yellow band 

 never interrupted ; hind femora more 

 or less broadly yellow at the base ; 

 all the tarsi yellow, or very rarely 

 the hind pair blackened at the tips. 

 1C (21) Abdomen with very broad black bands, 

 which are broadly shining behind, 

 the third and fourth segments in 

 great part black ; hind tarsi wholly 

 yellow, or only a little infuscated 

 towards the end. 



17 (20) Third and fourth abdominal segments 



wilh a yellow baud, the third without 

 transverse white stripe ; thoracic 

 stripes dullish or dull ; hind femora 

 black with yellow base. 



18 (19) Smaller and pale-coloured species; 



squamula3 pale with broad dark bor- 

 der: hind femora broadly yellow at 

 the base ; black thoracic stripes 

 narrow, not broader than the grey 

 stripes, the median stripe distinctly 

 divided trizonatiis, Big. 



19 (18) Species of larger size and darker 



colouring ; equarnulae blackish ; hind 

 femora narrowly yellow at the base ; 

 black thoracic stripes broad, the 

 median stripe scarcely divided, the 

 lateral stripes more than twice as 

 broad as the grey stripes jlaveolus, Big. 



20 (17) Third and fourth abdominal segments 



entirely black, the third with a com- 

 plete white stripe like the fourth ; 

 hind femora wholly yellow ; thoracic 

 black stripes shining, with a dull 

 black border .vanthopuSj sp. n. 



21 (16) Abdomen wholly yellow, with narrow 



black bands on the hind borders of 

 second, third, and fourth segments, 

 which are all opaque ; hind tarsi 

 black on the two apical joints ; all 



