Séancc du 24 Octobre 1023 135 



üf the scfjmcMib; lliorc are some much longer bristly 

 hairs on the lateral margins o! the three apical seg- 

 ments and on the lower margin of the fifth segment. 

 Venter all dull black except for a median longitudinal 

 shining black strijje; female ovipositor longer than 

 the abdomen, a little convex above but flat below, 

 shining black and bearing some minute black hairs. 



Legs black and yellow; all the femora are black; 

 front and middle tibiae black on their basal halves, 

 and yellow on their apical halves, although some- 

 times the black is a litlle more extensive on the mid- 

 dle tibiae, but never as much as on the hind tibiae 

 which are black except the apical fourlh yellow; tarsi 

 w^holly yellow- except the two or three apic^.l joiu'ls 

 of the hind tarsi blackish; pubescence on legs black 

 all over. 



Wings normal in shajie and c!iaracterised by 

 having, in addition to the four black hands, a large 

 black sjiot on the base which extends from 

 the costa to the base of M i. In other words the wings 

 are black with four hyaline indentations, three of 

 wdiich arc deep at the lower margin and one much 

 smaller at the upjier margin on the outer side of the 

 stigma, and one complete hyaline band after dhe black 

 base; the hyaline band extends from the costa after 

 the humeral cross-vein with its outer margin running 

 almost straight and vertically to the lower margin 

 aiid its inner margiii curving inwardly, almost in x 

 semicircle towards 'he l)ase of the wing, thus leaving 

 the loAver part of the wing base entirely hya- 

 line ; the three deep hyaline indentations at the 

 low^er margin are disposed as follov\'s : the first 



