242 JAMES WATERSTON. 



(19:3) with the apical comb /\ -shaped, containing about 30 spines. On the posterior 

 aspect is a somewhat irregular median row, indistinct both at the base and apex, of 

 stronger bristles. There are two apical spurs. Proportions of the tarsal joints : — 



Front .. 9 7 6 5 9 



Mid .. 18 8 5 6 9 



Hind .. 18 11 7 6 9 



Ahdmnen broad at the base, conic oval, produced anally ; sheath distinctly 

 developed ; ovipositor projecting. 

 Length nearly 3 mm. ; alar expanse, 5 mm. 

 Type — $ in the British Museum. 

 Southern Nigeria : bred from Cewplastes vuilleti, Marchal {Dr. W. A. Lamborn). 



Coccidoxenus obscuratus, sp. n. (figs. 2 d-f, 3 b). 



Antennae not quite so dark as in P. coelojos ; face uniformly dull, refringent, not 

 gleaming above the mouth-edge. Beyond the clear arc in the middle of the fore wings 

 the membrane is very faintly tinted, while below the radius and apex of the sub- 

 marginal there is a distinct cloud, extending to the hind margin. The first mid tarsal 

 joint only slightly whitish near the base, while the last three hind tarsal joints are 

 brown. Head with practically the dimensions and, in general, the puncturation of 

 P. coelops, but differing as follows : — narrower across the vertex ; at the level of the 

 lateral ocelli one-sixth of the width of the head ; ocelli in an isosceles triangle, the 

 lateral pair more remote from the occipital margin (one and a half diameters) ; toruli 

 nearer the clypeal edge (just under their own length) and wider apart ; post-scapal 

 furrows meeting superiorly in a sharp angle, the enclosed area nearly flat, with fewer 

 punctures, neither salient nor medianly subcarinate above the clypeus, no hollow from 

 the toruli to the genal keel ; genal surface at most raised reticulate, mthout thimble- 

 like punctures behind the keel ; facial pubescence not so strong as in coelops. In 

 this species the eyes are apparently quite bare when seen with a Zeiss binocular X 88 ; 

 under the same conditions, the eyes in coelops are very minutely and sparsely 

 pubescent. 



Antennae : length 1'2 mm., of which the scape is '37 mm. ; scape exactly 6:1- 

 pedicel (5 : 3) shorter than in coelops ; the four cylindrical joints in the funicle are 

 here relatively shorter and wider — e.g., in coelops the first funicular is three, in umbratus 

 only two and a half times as long as broad ; club (3 : 2) short and broad (in coelops 

 15 : 8), more abruptly dilated, three and a third times as broad as the first funicular 

 (in coelops two and two-thirds). 



Mouth-parts : labrum with 7 bristles, its edge straight (concave in coelops ?) ; 

 mandibles broader than in coelops (15 : 10), with the upper apical broad lobe practically 

 straight-edged, and the lower tooth very small ; about 20 external bristles. The 

 third joint of the maxillary palpus is shorter than the second, and the fourth broader 

 than in coelops ; bristles of the galea finer, no spines at the upper basal angle. 



Wings : tore wings shorter and broader than in coelops ; length, 1*75 mm., 

 breadth, '77 mm. ; submarginal to radius as in coelops, but the post-marginal even 

 more rudimentary than in that species — one-third of the radius ; the discal ciliatipn 

 is a little stronger and denser, the proximal angle between radius and marginal being 



