no R. W. CROSSKEY 



group of Odagmia in Rubzov (1959-1964 : 457-480). Also taxa from Canary 

 Islands omitted by Rubzov and listed below, together with S.(0.) spinosum Doby 

 & Deblock from western Europe and the few recently described forms of the ornatum- 

 group not included in Rubzov's coverage. Also S.(0.) odagmiinum (Enderlein). 

 The included taxa from the African area are : 



Canary Islands : Simulium {Odagmia) intermedium Roubaud ; S.(0.) insolitum 

 (Santos Abreu) ; S.(0.) H-nigrum (Santos Abreu). [Note : all three of these 

 names probably synonymous.] 



North Africa : Simulium (Odagmia) nitidifrons Edwards ; S.(0.) ornatum 

 Meigen ; S.(0.) egregium Seguy. [Note : the species from North Africa identified 

 by authors as nitidifrons is probably the same as intermedium Roubaud, but establish- 

 ment of definite synonymy is not possible at this time.] 



Subgenus SIMULIUM Latreille s. str. 



Simulium Latreille, 1802 : 426. Type-species : Rhagio colombaschensis Fabricius, 1787, by 



monotypy. 

 Gynonychodon Enderlein, 1925 : 208. Type-species : Simulium nobile de Meijere, 1907, by 



original designation. 

 Pseudodagmia Baranov, 1926 : 164. Type-species : Simulia variegata Meigen, 181 8, by original 



designation. (As subgenus of Simulium Latreille, 1802.) 

 Pseudo simulium Baranov, 1926 : 164. Type-species : Simulia argyreata Meigen, 1838, by 



original designation. (As subgenus of Simulium Latreille, 1802.) Junior homonym, pre- 

 occupied by Pseudo simulium Handlirsch, 1908 (Diptera). 

 Aspathia Enderlein, 1935 : 359. Type-species : Simulium hunteri Malloch, 1914, by original 



designation. 

 Danubiosimulium Baranov , 1935 : 158. Type-species : Culex columbaczensis Schonbauer, 1795 



[ = Rhagio colombaschensis Fabricius, 1787], by monotypy. (As subgenus of Simulium Latreille, 



1802.) 

 Cleito simulium Seguy & Dorier, 1936 : 141. Type-species : Simulium rupicolum Seguy & 



Dorier, 1936, by original designation. (As subgenus of Simulium Latreille, 1802.) 

 Gnus Rubzov, 1940 : 363. Type-species : Simulium decimatum Dorogostajskij, Rubzov & 



Vlasenko, 1935, by original designation. [Available with date 1940, since Gnus Rubzov, 



1937 : J 290 is an unavailable nomen nudum. .] 



Diagnosis. 6*$ : Basal section of radius bare (rarely haired in $). Pleural membrane bare. 

 Katepisternum bare. Fore tarsus moderately to strongly dilated, fore basitarsus 4-6 times as 

 long as its greatest breadth. $ : cibarium armed with blunt denticles or nodular granulations 

 between cornuae, rarely apparently unarmed. Tarsal claws simple or with minute basal tooth. 

 Scutum sometimes semi-shining without pattern, usually with definite pattern at least of grey 

 shoulder-marks, sometimes with bold striate black and grey pattern. Abdomen shining and 

 with sparse fine hair on broad tergites 6-8, narrower preceding tergites dull and matt, no scale 

 covering. Seventh sternite undeveloped. Gonapophyses simple bluntly truncate or rounded 

 lobes. Paraprocts normal. Spermatheca with or without definite polygonal pattern, without 

 internal hairs, o* : scutum patterned, at least with silver or greyish shoulder-marks, often with 

 bold black median area sharply contrasting with silver-grey pruinose margins, form of pattern 

 varied. Genitalia with very heavy elongate subparallel-sided styles from one and a half to 

 three times as long as the coxites, style with one apical spinule and often with an inner basal 

 projection ; coxite not produced beyond base of style ; ventral plate complex, angled and three- 

 dimensional, body of plate relatively small, often toothed and with haired beak-like process. 



