SPHIXCTUS. 



273 



and the outer continuous with the straight recurrent nervure ; 

 submedian longer than the median cell ; nervellus subopposite and' 

 intercepted but very slightly below its centre. 



This tribe is abundantly distinct in the peculiar conformation 

 of its areolet,the strongly petiolate abdomen, margined scutellum, 

 subvertical metathorax, and tibial calcaria. But one genus, con- 

 taining two species, has hitherto been described. 



Genus SPHINCTUS, Grav. 



Sphmcfus, Gravenhorst, Ichn. Eur. ii, 1829, p. 363, 

 Eradha, Cameron, Manch. Mem. 1899, p. 213. 



Genotype, >S. serotinus, Grav. 



The characters are those of the tribe. The only previously 

 described species, Spliindus serotinus, Grav., was found by Eatze- 

 burg in 1848 (Ichn. d. Forst. ii. p. 119) to attack the larvjB of a 

 moth, Limacodes tesiudo, Schiff. Cameron is undoubtedly correct 

 when he says {lot: cit.) that " it is very distinct from either 2Vor/M,5 

 or Amhhjteles," tliough his assertion that " it belongs to the 

 section Ambltpygi of Wesmael " is open to doubt, especially 

 when admitted to be founded on " the fact of there beino- no 

 longitudinal fold on the ventral surface of the abdomen in 

 the S ," since the only sex he knew was the female, as shown by 

 his type in the British Museum, received in 1899. 



Range. England, Central Europe, Assam. 



193. Sphinctus trichiosoma. Cam. (Plate I, fio-. y.) 



Eradha trichiosoma, Cameron,* Manch. Mem. 1899 p 214 ( 



$ . A black and pilose species, with the abdomen centrallv red 

 and the legs partly pale. Head as broad as the thorax" not 

 narrowed behind the eyes, black and pilose, with the external 



orbits very narrowly, and tlie 

 facial orbits triangularly to 

 above the obsolete scrobes, 

 stramineous; frons and face 

 dull, the latter slightly convex 

 centrally and hardly discrete 

 from the clypeus, which is 

 strongly biemarginate and 

 centrally acuminate at its 

 apex ; palpi and the obtusely 

 bidentate mandibles black. 

 Antennae much shorter than 

 the body, stout, slightly 

 Fig. C>9.-Sp/Hncfii.H irichiosohia, Cam. attenuate apically and entirely 



black. Thorax black and 

 gibbous ; mesonotum coriaceously punctate and convex, with no 

 notauli ; mesopleurje nitidulous and apically punctate ; meta- 



T 



