146 THE CANADIAN ENTOMOLOGIST 



not unlike that occurring in the subfamily Limnobiina.^; ninth tergite almost 

 straight across the caudal margin; pleurites subcylindrical, each with two 

 pleural appendages, borne at the apex; the outer appendage is flattened, pale, 

 elongate-oval in outline; inner appendage flattened, clothed with conspicuous 

 dense hairs; on the dorsal face before the tip produced into a long, blackened 

 point that extends beyond the other parts of this appendage; pleural suture 

 indicated only beneath, straight. Ninth sternite membranous, the caudal 

 margin with a deep, rounded, median notch. Penis-guard a simple, cylindrical 

 rod. Anal tube conspicuous, pale. Ovipositor with the tergal valves com- 

 pressed, strongly upcurved, the tips subacute; sternal valves very compressed 

 and flattened, the tips obtusely rounded. 



Habitat. — Ashanti. 



Holotype.— ^, Obuasi, June 20, 1907, (Dr. W. M. Graham), B. M. No. 

 1908-245. 



Alloiopotype. — 9 , in the copula with the male. 

 The types were caught in dense bush on a leaf. 

 Type in the collection of the British Museum (Natural History). 



Habromastix riedeliana, sp. n. 



Antenna? moderately elongated; mesonotum yellowish red, unmarked with 

 darker; wings pale brown, the costal region slightly darker; fusion of A'h and 

 Cu\ punctiform; abdomen yellow, striped longitudinally with black. 



Male.- — Length about 11.8 mm.; wing 11.5 mm. Hing leg, femur 7.5 mm.; 

 tibia 9.7 mm. 



Female. — Length about 12 mm.; wing 11.5 mm. 



Frontal prolongation of the head short but evident, brownish yellow; 

 nasus lacking; palpi short, dark brown. Antenna? moderately elongate, in the 

 male, if bent backward, extending about to mid-length of the abdomen; but 

 nine flagellar segments; scape and basal swelling of the first flagellar segment 

 >'ellow, remainder of the flagellum dark brown, clothed with a dense, erect, 

 pale pubescence; verticils short and sparse. Head brownish, covered with a 

 pale pollen; no vertical tubercle; vertex between the comparatively small eyes 

 broad. 



Mesonotum light yellowish red without darker markings. Pleura (;l)scure 

 yellow. Halteres long and slender, pale yellow, the knobs dark brown. Legs 

 with the coxic and trochanters yellow; femora yellow basally, the outer half 

 pale brown, the tips dark brown; tibite pale brown, the tips narrowly .-lark 

 brown; tarsi brown. Wings with a pale brownish tinge, the costal and sub- 

 costal cells, and the stigma, slightly darker brown; \eins indistinctly seamed 

 with brown; an indistinct whitish spot before the stigma in cell /,v/ R\ and an- 

 other crossing cell Isi M-i; veins dark brown. Venation: Rs rather short and 

 feebly arcuated, about equal to Ri,:i,; cell Ri large, veins R-i and Rv, divergent; 

 cell 1st Mo rather small, pentagonal; petiole of cell M\ al)out one-half longer than 

 m; fusion of M--, and Cii\ very slight, almost punciiform. 



Abdomen yellow, heavily lined with black; basal tergite \ellowish brown; 

 second tergite yellow with brown median and lateral stripes; tergites three to 

 .seven with the conspicuous median and lateral stripes broadly connected apically 

 so that only the sides at the base are of the obscure yellow ground-colour. Eighth 



