326 EMPIB^. 



Table of Genera. 



1. Second longitudinal vein beginning nearer 



humeral cross-vein than anterior cross- 

 vein 2. 



Second longitudinal vein beginning nearer 

 anterior cross-vein than humeral cross- 

 vein 4. 



2. Anal cell ending much before margin of wing 3. [p. 334. 

 Anal cell extending to margin of wing .... Harpamerus, Big., 



3. Hind f smora incrassate, spined below .... Syneches, Walk., 



[p. 327. 

 Hind femora not incrassate nor spined below Acartertjs, Lw., 



4. Basal portion of 4th vein (dividing basal [p. 334. 



cells) indistinct , : Syndyas, Lw., p. 333. 



Basal portion of 4th vein (dividing basal 

 cells) distinct 5. 



5. Hind femora incrassate: thorax very humped; 



arista apical Hybos, Mg., p. 336. 



Hind femora not incrassate ; thorax less [p. 343. 



humped ; arista subapical Paeahybos, Kert., 



These characters are mainly comparative, especially as regards- 

 the origin of the 2nd longitudinal vein. The degree of incrassa- 

 tion of the hind femora and the size of the spines on its underside 

 are both variable characters. The sole characteristic of Syndyas 

 seems a very weak one, whilst that distinguishing Harpamerus 

 appears very strong, yet the latter is sunk in Syneches in Kertesz's- 

 Catalogue. Both these latter genera are unknown to me. It is- 

 difficult to draw definite generic limits in Htbotiinm: without an 

 exhaustive examination of all the known species. 



Table of Species of Syneches (sensu lato), 

 Syndyas, and Harpamerus. 



1. Anal cell extending to wing-margin .... signatus, Big., p. 334. 

 Anal cell ending much before wing- 

 margin 2. Tp. 328- 



2. Thorax bright brownish yellow immaeulatus, Brum, 



Thorax black, blackish brown, or dark 



brown 3. 



3. Wing with several dark brown marks, 



apart from stigma bigoti, Bezzi, p. 329. 



Wing unmarked, apart from stigma ; 



ground-colour from clear to brownish 4. [p. 333- 



4. Discal cell unusually small parvicellulata, Bezzi, 



Discal cell at least more than twice as 



long as broad 5. 



•5. Legs, at least femora (except extreme 



base or tip), all yellow 6. 



Legs mainly black or dark brown, at least 



all femora practically so (except hind 



femora in rusticus) 7. 



6. Thorax less arched ; legs with soft pubes- 

 cence in addition to tibial bristles ; 



anal cell considerably longer than 2nd 



basal, with subcorneal tip inaqualis, Brum, p. 330- 



