BY FREDERICK A. A. SKUSE. 73 



about the width of the thorax ; first segment short, half the width 

 of the third ; second truncate-conical ; fourth and fifth widest, 

 short ; sixth and seventh narrowing ; ovipositor with two straight, 

 slender, pointed upper valves, the lower ones also straight, but 

 thicker, about § the length of the upper. Legs tolerably short 

 and stout, densely clothed with short semi-erect hairs ; tibiae 

 about equal in length to the femora, armed with a pair of spurs ; 

 tarsi rather shorter than tibiae, the metatarsal joint rather shorter 

 than the remaining four joints taken together ; ungues large, 

 smooth. Wings about length of the entire insect, broad, with a 

 distinct anal angle. First longitudinal vein terminating in 

 anterior branch of second near the base in such a manner that 

 the remaining portion of the branch appears as a continuation of 

 the first. Second posterior cell petiolate. Fifth posterior cell 

 longer than wide, nearly or quite in punctiform contact with the 

 discal cell. 



Macquart was mistaken when he asserted that the antennae are 

 14-jointed, he evidently counted the tenth joint as two ; also, the 

 first flagellar joint is not provided with a pair of branches, but is 

 produced beneath. 



395. Ctenogyna bicolor, Macquart. (PI. iv., fig. 4.) 



C. bicolor, Macq., Dipt. Exot. I. p. 43, pi. 2, figs. 2 and 2a., 

 1838, 



9. — Length of antennae. 0-120 inch ... 3-04 millimetres. 



Expanse of wings 0-540 x 0-160 ... 13-70x4-06 



Size of body 0-540x0-090 ... 13-70x2-27 



Head brown, or black, pubescent ; face, genae, rostrum and 

 palpi brownish-fulvous, the nasus and last two joints of palpi 

 sometimes brown; antennae black or blackish-brown, the two 

 joints of the scapus fulvous or brownish-fulvous ; first flagellar 

 joint with a single short branch beneath ; the second to eighth 

 cylindrical, with a short branch on each side at the base ; remaining 

 three terminal joints ovate. Collare fulvous. Thorax fulvous to 



