146 INSECUTOR INSCITI^ MENSTRUUS 



Ptychoptera camerounensis, new species. 



General coloration blue-black ; thoracic sternites and ventral 

 pleurites reddish yellow; wings grayish subhyaline, with two 

 narrow brown crossbands ; abdomen orange with a subterminal 

 black ring; tergites one to five ringed caudally with brownish 

 black. 



Male. — Length, about 8 mm.; wing, 7.4 mm. 



Mouthparts reddish testaceous; palpi obscure yellow, the 

 terminal segments brown. Antennal flagellum black, the scapal 

 segments in the unique type injured. Head blue-black. 



Thoracic notum blue-black. Dorsal pleurites brownish black, 

 the ventral pleurites and sternites reddish yellow ; a narrow 

 yellowish white area on the propleura between the anterior 

 spiracle and the fore coxa. Halteres dark brown, the base of 

 the stem reddish yellow. Legs with the coxse and trochanters 

 reddish yellow ; femora yellowish testaceous, darkened toward 

 the tip ; tibiae and tarsi dark brown. Wings grayish subhya- 

 line, the costal region more brownish yellow ; two narrow 

 brown crossbands, the first at the cord, extending to beyond 

 the fork of Cu; second crossband at the fork of R^-i-^, becom- 

 ing indistinct at the fork of M; veins dark brown; matro- 

 trichise of wing extensive, passing into the distal ends of the 

 basal cells. Venation : Rs short, straight, a little shorter than 

 r-m. 



Abdomen orange, tergites one to five ringed caudally with 

 brownish black; a black subterminal ring; hypopygium red- 

 dish brown. Hypopygium with the lateral angles of the ninth 

 tergite digitiform, tapering caudally and ventrally into slender 

 hairy points ; pleural appendages generally similar in shape 

 to the tergal lobes, elongate, cylindrical, slightly curved, the 

 tips blackened, at the base on the inner face with a small tooth. 



Habitat. — Cameroun. 



Holotype, male. Lolodorf, October 31, 1913 (A. L Good). 



Type in the Carnegie Museum, Accession No. 5264. 



