.4 Monogrtiph of Egyplian Diplera. 79 



ish-green when alive) which possesses a blaek and yellow thorax, a 

 yellow abdomen, hyaline wings and a long corneous fenaale oviposi- 

 tor. 



Maie and Female. Length of body : 6.3 mm. ; ovipo.sitor : 

 1.9—2.2 mm.; wing : 4.8 mm. 



DES( 'RIPTION: — Head very broad, entirely yellow, exeept thi^ 

 face (which is .slightly concave) much paler owing to a whitish pul- 

 verulence, and the vertical triangle black; antennae pale yellow and 

 possessing a very délicate and minute, pale pubescence, with the 

 third joint fairly broad and rounded at the tip; arista microscop- 

 ically pubeseent, blackish exeept on its basai third yellow; the 

 first and second antennal joints possess some short black bristles; 

 the pubescence is short and brownish on the sides of the frons, longer 

 and decidedly bristly on the cheeks and jaws and on the occiput yeh 

 lowish; in addition the vertical triangle possesses a few blackish 

 erect hairs; palpi with black bristles on the apical half; .s. or. 2, 

 strong; pvt. parallel ; al! the bristles are black exeept the pi't. and 

 the oc p. yellowish. 



Thorax blacki.sh on most of the di.sc but yellow on the margins 

 and pleurae; the black markings on the dise are very characteristic ; 

 on the upper margin the black starts as a broad but short médian 

 stripe, which widens laterally till just before the humeri, and ex- 

 tends down to the suture, where it continues downwards in a stripe 

 covering the médian third of the dise and finishing at about two 

 thirds the lengths of the dise; on each side of this stripe there are 

 two elongated black stripes, gradually tapering at both ends, their 

 upper ends running into the black of the dise at the suture, and their 

 lower margins ending at a small distance from the apex of the dise; 

 thèse two latéral stripes are separated inwardly in their upper 

 halves from the médian black stripe by a thin yellow line; in addition 

 there are two small black rounded spots in a straight line with the 

 tip of the two black latéral stripes, from which arise the prsc. ; in 

 other words the dise is black exeept the latéral margins above the 

 suture yellow and below the suture broadly yellow, as well as the 

 lower margin and the basai médian third yellow; the whole of the 

 dise and pleurae are covered with a very fine whitish dust; the pu- 

 bescence on the dise is fairly dense and pale yellowish ; seutellum en- 

 tirely yellow and possessing four bristles; mesophragma shining 

 black; 1 strong tnpl. ; the pleurae are yellow exeept for an elongated, 

 emarginate oblique spot continuing down from the mesophragma, a 

 small rounded spot on the lower margin below the posterior stigma 

 and between the middle and hind coxae shining black, in addition 

 there is a large black and shining spot behind the wing base an.I 

 immediately below the 2 p. sa. 



