à\ — 



Undescmbed crase-flies in THE Paris Museum (Tipulidae Diptera), 



AfRICAN SpECIES OF THE SuBFAMILY LlM.XOBHNAE, 



by Charles P. Alexander. 



Ph. D., Urbaua, 111., U. S. A.W. 



Tribe ANTOCHINI. 



Genus Ceratocheilus Wesclîé. 



Ceratocheilus nigripleura, nov. sp. 



Head gray ; mesonotal praescutum buffy with three broad brown stripes; 

 a broad black pleural stripe; wiugs snbhyaline with five costal markings, 

 the first at the humerai crossvein , the third and fourlh at the ends of veins 

 Sel and Ri and connected with one another along Rs and the base of 

 /?2+3; basai deflection of Cul at the fork of M. 



female. — Length (exckuUng rostrura), ii,3 mm.,wing 6,5 mm.; 

 rostruin, aboul 7 mm. 



Rostrum elongate, dark brown; palpi dark brown. Antennae black, 

 twelve-segmented, the distal flagellar segments long-cylindrical. Verlex 

 light gray with a linear dark brown mark; cornicuflis conspicuously light 

 yellow. Vertex narrow, a iittle wider than the widih of the coi-niculus. 



Mesonotum light buffy brown, the praescutum with three broad dark 

 brown stripes , the interspaces narrow ; postnotura slightly darker medially. 

 Pleura pale yellow, sparsely while pruinose; a broad brownish black stripe 

 extending from the pronotum , wliich is also black, to the base of the 

 abdomen, passing through the base of the haltères. Haltères pale brown, 

 the extrême base and the large knobs dark brown. Legs with the coxae 

 and trochanters pale yellow ; remainder of the legs dark brown , covered 

 with flattened bilîd hairs. Wings subhyaline, a dusky tinge just beforc the 



(') Voir la note du même auteur sur la tribu des Limnobiini {Bull. Muséum, 

 1919, p. 606). 



