IMJIA(!US. 



11 



50 (51) Tliird autennal joint "bare, as usual, 



more or less elongate ; arista well 

 developed, of ordinary size ; face 

 without oblique furrows MICRODON, p. 119. 



51 (50) Third auteimal joint many times as 



long as the first, with a fringe of 

 long hair on its whole length ; arista 

 rudimentary, represented only by 

 a short stump; face \\ith oblique 



furrows PTILOBACTRUM, p. 136. 



52(47) Antennae with a terminal style, and 

 very often placed on a long petiole ; 

 small cross-vein beyond middle of 

 the discal cell . . . .' CKUIOIDES, p. 138. 



Subfamily I. SYRPHIN^E. 

 Genus 1. PARAGUS, LatreiUe (1804). 



The species of this genus are widely distributed throughout the 

 Kthiopian region, and the present collection includes representatives 

 of practically all the known species, as well as two new to science. 



Parayus sif/nedus. Walker (I860), from Natal, steins to be a 

 Gi-fi/>tonii/zfi. as Dr. Speiser has recently pointed out. 



The species before me may be tabulated as follows : 



1 (4) Abdomen with the middle segments fused 



together, the sutures being sometimes 

 distinguishable in the female only ; 

 shape of body broadly ovate ; wings 

 without pubescence "in the middle; 

 eyes with very long pubescence, 

 which forms distinct stripes. 



2 (3) ScutHllum with the apical half yellow, 



and with the hind border deeply 

 serrulate ; face in both sexes with a 

 black stripe ; thorax with two distinct 

 whitish dorsal stripes serratus, Fabr. 



3 (2) Scutellum wholly black and not serrulate 



behind ; face of the mole without a 

 black stripe ; thorax without distinct 

 stripes borbonicus, Macq. 



4 (1) Middle segments of the abdomen well 



separated, only the first and second 

 fused together: shape of body narrowly 

 elongate : wings with distinct pubes- 

 cence towards the middle ; eyes with 

 very short, sometimes hardly distin- 

 guishable pubescence, which is not 

 arranged in stripes ; scutellum always 

 black. 



5 (10) Face of the male without a black stripe; 



wings with distinct pubescence in the 

 middle ; species usually of larger 

 size, with less produced face and a 

 narrow vertical triangle in the male. 



