158 THE ENTOMOLOGIST. 



01' thorn on the ventral surface inserted immediately behind the 

 joint. There is no such tooth on the tarsus of the third pair. 



Wings : Very darkly scaled with Trichoprosopon-like scales, 

 bluish and markedly ribbed. First submarginal cell one-fourth of its 

 length longer than the second posterior cell. The stem of the first 

 submarginal is about two-thirds the length of the cell. The super- 

 numerary and mid cross-veins are close together, the posterior about 

 its own length towards the base of the wing. The sixth vein turns 

 at right angles to the costa just before its termination. 



Genitalia : The claspers are long, curved, and without terminal 

 articulate spine, covered, the basal half with scales, the distal half 

 with seven long hairs. The harpes are long, curved, and expanded 

 into a flattened blade tapering to a rounded point. 



Length : 5 mm. 



? . Head as in male. Antennae : Much less plumose ; other- 

 wise similar to those of the male. Palpi : Short, black-scaled, 

 acuminate. 



Proboscis, clypeus, thorax, scutellum, pleurae, prothoracic lobes, 

 halteres, metanotum : As in male. 



Abdomen : As in male, and with the dorsal silvery band on the 

 seventh segment complete. 



Legs : As in the male, but the last two segments of the hind tarsi 

 are of normal form, i. e. unfeathered. 



Ungues : First pair equal, uniserrate ; second pair equal, uni- 

 serrate ; third pair equal, simple. 



Wings : Colour and scales as in male. First submarginal cell 

 one-fifth of its length longer than the second posterior cell. The stem 

 of the first submarginal is usually one-third the length of the cell. 

 The supernumerary and mid cross-veins are close together, the pos- 

 terior about its own length towards the base of the wing. The sixth 

 vein is as in the male. 



Length : 6 mm. 



Habitat. Obuasi, Kumasi, Dompoasi ; taken in bush August 

 to November. Also reared from larvae taken in a small collec- 

 tion of water in the hollow of a tree near Dompoasi, Aug. 14th. 



4. Eretmapodites melanopous, nov. sp. 



$ , Head, antennae, palpi, proboscis, clypeus : As in No. 3. 



Thorax : As in No. 3, but the ground colour is somewhat darker 

 brown, and black scales predominate. 



Scutellum, pleurae, halteres, metanotum : As in No. 3. 



Abdomen : Is a velvety black, with basal white ventral banding, 

 the bands showing laterally, and gradually becoming more apical till 

 the apex is white ventrally on the sixth segment. There is a yellow 

 spot on the sixth and seventh segments of the venter. The white 

 banding becomes dorsal on the seventh segment, but the lateral spots 

 do not meet in the middle line. 



Legs : As in No. 3, but the hind tarsi are unfeathered. 



Ungues : First pair unequal, simple ; second pair unequal, simple ; 

 third pair equal, simple. The terminal segment of the tarsus of the 

 first pair has two strong teeth inserted immediately behind the joint. 



