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XV. On Byrsops, and some allied genera. By Francis P. 

 Pascoe, F.L.S., &c. 



[Bead June 1st, 1887.] 



Plate XI. 



Only one species of Byrsops* has, I believe, been de- 

 scribed since 1842, when Schonherr enumerated twenty- 

 five. I have now in the following pages described four- 

 teen, which I have not been able to identify with any of 

 his descriptions. To these I have added a few others, 

 chiefly new generic forms, belonging to the same sub- 

 family. 



With Lacordaire's " Byrsopsides vrais" I place Syn- 

 thocus, it having the same prothoracic canal as Byrsops. 

 These and the other genera of this section of Byrsopince 

 may be better understood by the following table : — 



Intermediate coxas contiguous. 

 Prothorax spined at the sides . . . . Hoplitotbachelus, ScKon. 



Prothorax not spined. 



Tarsi elongate . . . . . . . . Byrsops, Schon. 



Tarsi not elongate. 

 Funicle six-jointed . . . . . . Dyeeocera. 



Funicle seven-jointed. 



Club adnate . . . . . . . . Daulaxius. 



Club not adnate. 

 First abdominal segment distinct Ixodicos, Pasc. 

 First abdominal segment combined 

 with the second . . . . . . Liasotus. 



* The genus was first distinguished by Schonherr in 1826 under 

 the name of Cryptops (Cure. Disp. Meth., p. 65) ; previous writers 

 — Thunberg, Wiedemann, &c. — had confounded it with Brachy- 

 cerus. Schonherr subsequently changed the name to Byrsops. 

 He spoke of its species being from the Cape and Bengal, but as it 

 is exclusively South African, it would be interesting to know what 

 were the insects he mistook for Byrsops. They were in Wester - 

 mann's collection at Copenhagen. 



TRANS. ENT. SOC. LOND. 1887- PART III. (SEPT.) 



