30 R. W. CROSSKEY 



to the generic diagnosis given : in pedipupalis the cocoon has a short stalk and 

 covers only the pupal abdomen, being rather goblet-shaped instead of the normal 

 boot shape. 



Included taxa. The following described species are assigned to Metacnephia 

 gen. n. and new combinations therefore established : 



Nearctic Region : Metacnephia freytagi (DeFoliart & Peterson) comb. n. ; M. 

 jeanae (DeFoliart & Peterson) comb. n. ; M. saileri (Stone) comb. n. ; M. 

 saskatchewana (Shewell & Fredeen) comb. n. ; M . sommermanae (Stone) comb. n. ; 

 M. villosa (DeFoliart & Peterson) comb. n. 



Palaearctic Region : Metacnephia bilineata (Rubzov) comb. n. ; M. bland 

 (Grenier & Theodorides) comb. n. ; M. crassifistula (Rubzov) comb. n. ; M. 

 danubica (Rubzov) comb. n. ; M. edwardsiana (Rubzov) comb. n. ; M. fuscipes 

 (Fries) comb. n. ; M. gorodkovi (Rubzov) comb. n. ; M. hajotsdzorensis (Terterjan) 

 comb. n. ; M. kirjanovae (Rubzov) comb. n. ; M. korsakovi (Rubzov) comb. n. ; 

 M. lesnei (Seguy) comb. n. ; M. lyrata (Rubzov) comb. n. ; M. multifilis (Rubzov) 

 comb. n. ; M. nigra (Rubzov) comb. n. ; M. octodecimfiliata (Rubzov & Violovich) 

 comb. n. ; M. pallipes (Fries) comb. n. ; M. pedipupalis (Rubzov) comb. n. ; 

 M. persica (Rubzov) comb. n. ; M. ramificata (Rubzov) comb. n. ; M. sardoa 

 (Rivosecchi & Contini) comb. n. ; M. tabescentifrons (Enderlein) comb. n. ; 

 M. terterjani (Rubzov) comb. n. ; M. tetraginata (Rubzov) comb. n. ; M. 

 tredecimata (Edwards) comb. n. ; M. trigonia (Lundstrom) comb. n. [nigra and 

 persica as given include the infraspecific named forms included under these names 

 by Rubzov (1959-1964)]. 



Two of the Palaearctic species in the foregoing list occur in North Africa, both 

 being recorded from Morocco (Grenier et al., 1957) : they are Metacnephia bland 

 and M . tredecimata. 



AFROSIMULIUM gen. n. 



Type-species : Simulium gariepense de Meillon, 1953. 



Genus of Simuliini closely allied to Simulium Latreille s.l., with the following 

 combination of characters : 



Diagnosis, o*? : Antenna with 11 segments. Head extraordinary [see detailed discussion], 

 not wider than its height, occipital foramen subovate, postgenal lobes not strongly angulate at 

 lower margin of foramen, postgenal membrane wide and area between cardines completely 

 membranous; eye shape modified in accordance with head shape. Last segment of maxillary 

 palp short, subequal to third segment (Text-fig. 305). Pleural membrane bare. Mesepisternal 

 sulcus narrow and deep, sharply defined and complete. Katepisternum bare, longer than its 

 depth in profile. Costa with spiniform and hair-like macrotrichia. Vein Rs simple, Cuz sinuous, 

 submedian fork very indefinite. Basal cell absent or vestigial. Basal section of radius bare. 

 Wing membrane with exceptionally reduced microtrichia (Plate iB), appearing totally bare 

 hyaline at magnification up to x 100 or x 150. Fore legs exceptionally slender (Text-fig. 307). 

 Calcipala almost absent (Text-fig. 306). Pedisulcus present, deep. $ : hypopygium (Text-fig. 

 308) with small truncate styles with one apical spinule; ventral plate bilobate with each side only 

 narrowly connected medially, basal arms very slender; parameral hooks numerous. $ : 



