36 Dr. C. P. Alexander on African Crane-flies 



less than one-half of r-m ; inner ends of cells i? 3 , 7? 5 , and 

 1st M 2 in alignment ; basal deflection of Cu x just before the 

 fork of M, the fusion about equal to R 2 . 



Abdominal tergites dark brown, the sternite more yellowish 

 brown. Male hypopygium with two pleural appendages, tbe 

 outer appendage slender, much longer than the inner appen- 

 dage, the tip broken in the unique type. Inner pleural 

 appendage rather small, broad at the base, rapidly narrowed 

 to the subacute, heavily blackened tip, the face with numerous 

 setigerous punctures that bear stout setae. Gonapophyses 

 and penis-guard forming a large, pale, central organ of 

 which the only heavily chitinized elements appear as two 

 divergent, laterally directed horns. 



Hob. Nyasaland. 



Holotype, <$ , Mt. Mlanje, November 8, 1913 (S. A. Neave). 

 B.M. no. 1914. 498. 



Type in the collection of the British Museum (Natural 

 History). 



Gonomyia nyasae is very similar to G. sulphur elloides, 

 Alexander (Natal to Nyasaland), from which it is readily 

 told by the very different male hypopygium, in G. sulphu- 

 relloides the inner pleural appendage terminating in three 

 points instead of being simple as in the present species. 



Gonomyia (Gonomyia) noctabunda, sp. n. 



Antennae dark brown, the scape paler ; pleura dark brown 

 with a narrow, white, longitudinal stripe ; femora yellowish 

 brown with a narrow brown ring before the tips ; wings 

 nearly hyaline ; veins dark brown, C, Sc, and R more 

 yellowish; abdomen blackish, the segments narrowly 

 margined caudally and laterally with pale yellowish white. 



Male. — Length 2'8-3 mm. ; wing 33 mm. 



Female. — Length 3'8-4 mm. ; wing 3*5-4 mm. 



Rostrum and palpi dark brown. Antennae dark bro'wn, 

 the scapal segments a little paler, slightly enlarged. Head 

 light orange-brown. 



Mesonotal praescutum light hrown, the lateral margins 

 narrowly pale yellowish; remainder of mesonotum pale 

 brown, light grey-pruinose, the scutellum margined caudally 

 with pale whitish. Pleura dark brown with a conspicuous, 

 narrow, white, longitudinal stripe ; mesosternum dark brown. 

 Halteres yellow, the knobs dark brown. Legs with the coxae 

 yellow, the basal half of the outer face brown ; trochanters 

 dull yellow ; femora pale yellowish brown with a narrow 

 dark brown ring just before the tip; tibiae pale brown, the 

 tips dark brown ; tarsi dark brown. Wings nearly hyaline, 

 the veins dark brown, conspicuous ; C, Sc, and R more 



