130 Memoirs of the Indian Museum. [Vol. Ill, 



2. (i). Pvi. and the two superior occipital bristles pale yellowish; irons 

 in the middle clothed with short and thick whitish hairs ; ovi- 

 positor broader, shorter than the abdomen . . . . xanthotricha , n. sp. 



53. Aciura monochaeta, n. sp. ? . 



(PI. X, fig. 54). 



A black species with yellow head, antennae, tibiae and tarsi, only a pair of superior 

 or., very long ovipositor, and wings black, the base being also black, the axillar lobe 

 hyaline with 6 indentations and 2 discal spots whitish-hyaline. Length of the body 

 4 mm., of the ovipositor 3 mm. 



Head yellow, with some grey pollen ; all the bristles black, including those of the 

 occipital row which are scarce and weak ; pvt. very weak ; only a pair of superior or. ; 

 frons in the middle with a few pale thick hairs ; antennae yellow, the third joint being 

 twice as long as the second ; arista pubescent, the hairs being longer than in the Euro- 

 pean species. 



Thorax shining black, with scarce greyish pollen ; humeri and pleura entirely 

 black ; scutellum also wholly black, rather developed, triangular ; all the bristles are 

 black. Squamulae dark ; haltères light yellow. Abdomen coloured like the thorax, 

 elongate, narrowed at the base, convex in the middle, without bristles ; ovipositor as 

 long as the abdomen, or longer if the apical joint is included, convex, narrow, with 

 short black pubescence and small yellow apical style. L-egs with black coxae and 

 femora, the tarsi darkened towards the tip ; hind tibiae with the two basal thirds 

 black ; front femora bearing only 2 bristles beneath at the apex. 



Wings blackened to the extreme base, only the alula and the axillar lobe being 

 hyaline. There are the following 6 indentations. One very small in the base of the 

 costal cell, after the humeral cross- vein, extending below to the third vein. The second 

 and third are placed toward the middle of the fore border, just after the stigma, and 

 are close together ; they are of triangular shape, the first has the vertex on the third 

 vein, the second is smaller and shorter and does not touch the third vein ; the costa 

 is yellow in correspondence with the bases of these triangles, and the vertex of the 

 second triangle is over the small cross- vein. The three other indentations are at the 

 hind margin, and equidistant from each other ; the first is in the base of the second 

 posterior cell, with the apex before the superior end of the hind cross- vein ; the second 

 is in the apex of the third posterior cell with the apex on the fifth vein ; the third is in 

 the base of the same cell with the apex on the same vein, and is therefore longer. The 

 two hyaline rounded spots are : one in the middle of the base of the first posterior 

 cell, a little beyond the posterior cross- vein ; the second towards the end of the discal 

 cell, just below the small cross-vein. All these spots and indentations are of a white 

 colour ; the axillar lobe is greyish hyaline, except in the middle where it is white. 

 Costal bristle very minute ; stigma black, with its superior external angle yellow ; 

 small cross- vein close to the hind cross- vein, being at a distance from it which is a little 

 greater than its own length. 



- A single female from Calcutta, 5-i-o8 (-^1^^). 



