INSeCUTOR INSCITI^ MENSTRUUS 145 



rigid slightly oblique line beyond the middle, white, narrow, 

 followed by a narrow purple brown border. Expanse, 19 mm. 



Types, four males, No. 24344, U. S. Nat. Mus. ; Paradise 

 Key, Florida, March 4 and 9, 1919 (Schwarz & Barber). 



The wing-shape of laticlavia Clemens, than which this is 

 smaller, the transverse line rigid and narrow, the subapical 

 branch obsolete. 



AN UNDESCRIBED WEST AFRICAN SPECIES OF 

 PTYCHOPTERA MEIGEN 



(Diptera, Ptychopteridce) 



By CHARLES P. ALEXANDER 



In a small collection of crane-flies from the Cameroun sent 

 to me for naming by Dr. Holland and Mr. Kahl of the Carnegie 

 Museum, there was included an undescribed species of Pty- 

 choptera. I am indebted to Dr. Holland and Mr. Kahl for 

 the privilege of studying their collections' of West African 

 Tipuloidea. 



The three known Ethiopian species of Ptychoptera may 

 be separated by the following key: 



1. Mesonotum orange, unmarked (Natal — Eastern Transvaal), 



capensis Alex. ^ 

 Mesonotum blue-black 2 



2. Thoracic pleura yellow ; wings with the costal margin and apex 



dark brown ; abdomen black, the third and fourth tergites with 



narrow yellow rings (Nigeria) africana Alex. ' 



Thoracic pleura brownish black with a restricted yellowish white 

 area ventrad of the anterior spiracle; wings with the costal 

 margin and apex not conspicuously darkened; abdomen orange, 

 tergites one to five ringed caudally with brownish black ; a 

 black subterminal ring; hypopygium reddish brown (Cam- 

 eroun) camerounensis, new species 



''Ptychoptera capensis Alex.; Ann. S. Afr. Mus., vol. 17, pp. 139- 

 140; 1917. Type in South African Museum. 



'Ptychoptera africana Alex.; Entomologist, vol. 53, pp. 101-102; 1920. 

 Type in British Museum. 



