80 SYBPHIDJ3. 



the femora broadly yellow towards 



the base vicarians, sp. n. 



22 (15) Second abdominal segment with a 



broad black fore border, which is 

 usually united with the hind border 

 in the middle line, the first yellow 

 band consequently interrupted in the 

 middle ; hind femora quite black ; 

 all the tarsi black at the tips. 



23 (24) Eyes with a few well-separated black 



spots ; sides of face wholly dull, 

 densely covered with pollen ; thorax 



on the back entirely dull diilciSj Karsch. 



24. (23) Eyes with very numerous, partly con- 

 fluent, black spots ; sides of face a 

 little shining 1 , the black colour of the 

 ground being distinct ; dorsum of 

 thorax distinctly shining on the pos- 

 terior half dissimilis, Ad. 



76. Lathyrophthalmus modestus, Wiedemann (1818). 



Very distinct -from any other species of the present genus on 

 account of its bare eyes, which are broadly separated in the male, 

 and of its thorax, which is without any distinct pattern on the 

 back. 



Originally described from South Africa as a HelopJiilus, I think 

 that this is the species subsequently described by Macquart as 

 Eristalis anal is ; Adams has recorded the latter species from 

 Khodesia, but, from his description of the thorax and fourth abdo- 

 minal segment, it appears more probable that he had the species 

 myiatropinus before him. 



The genitalia of the male are very characteristic ; they are 

 globose, shining reddish black ; the fourth ventral segment ter- 

 minates below in a long appendage, which is deeply incised in the 

 middle, appearing hilobed ; the third ventral segment is also pro- 

 duced in the middle, but not bilobed. The }'ellow band on the 

 second abdominal segment is often divided in the middle, chiefly 

 in the female, the anterior black band being united with that on 

 the hind border. 



A male from Deelfontein, Cape of Good Hope (Surg.-G-en. Sir 

 A. T, Sloggett); another male from the Cape of Good Hope, without 

 precise locality ; a female from the Cape of Good Hope (presented 

 by Rev. A. E. Eaton}. A small female from Stellenbosch, Cape 

 of Good Hope, xi. 1904 ( G. A. K. Marshall), is only 10 mm. long, 

 and has the yellow hind borders to the segments a little broader 

 than usual ; the eyes have no distinct spots, but the specimen is 

 greasy ; I have a very similar female from Willowinore, Cape of 

 Good Hope, in which the spots on the eyes are as usual very 

 distinct. 



