CERATOSTEPHANUS. 407 



moderate length. Palpi stout, rather long, 4-jointed, 1st joint the 

 shortest. The second generic character of importance is the 

 extraordinary appendages to the antennae. The 1st scapal joint 

 is normal, moderately long, rather broader at the tip ; the 2nd is 

 large, wider, oval ; both joints with stiff hairs. The flagellum 

 consists of twelve elongate joints, each with a pair of diverging 

 strong long bristly hairs on the upperside, situated a little 

 beyond the base, and furnished on the underside at about the same 

 place with a pair of large elongate conspicuous palp-like pubescent 

 appendages. The legs are very thin and much lengthened. 



Range. The genotype is the only species known. 



The peculiar formation of the antenna? in this genus immediately 

 distinguishes it from all others known from the East. There is a 

 resemblance in the antennal appendages to "VVestwood's illustration 

 of Ozodicera gracilis,* "Westw., but that genus belongs to the 

 subfamily TIPTJLIN.E. 



297. Ceratostephanus antennatus, Brun. (PI. XI, fig. 17.) 



Ceratostephanus antennatus, Brunetti, Ilec. lud. Mus. vi ; p. 272 

 (1911). 



d 1 . Head blackish at the back, with a few bristles. Owing to- 

 the construction of the eyes, which are absolutely contiguous from 

 the vertex downwards, there is no frons, but a row of irregular- 

 sized bristles set between the eyes shows the only line of demarca- 

 tion between them. Proboscis brown ; palpi dark brown, pubescent^ 

 1st joint the shortest, the others comparatively long. Antennae 

 with the 1st scapal joint elongate, broader at tip, 2nd enlarged 

 considerably, oval, both with stiff hairs. The flagellum of twelve 

 elongated cylindrical pale yellow joints, each with a pair of strong 

 long diverging bristles on the upperside just beyond the base ; on 

 the underside, at about the same place are two dark brown 

 elongate palp-like processes, very conspicuous, pendant, and of 

 considerable size, with whitish pubescence. Thorax brownish, 

 darker on the dorsum ; scutellum and metanotum of similar colour. 

 Abdomen brownish yellow, sides of abdomen and posterior margins 

 of segments distinctly blackish; belly similar. Genitalia con- 

 sisting of a pair of large linear fleshy claspers of two joints of 

 equal length and size, below which is a horny narrow elongate 

 style, apparently immovable. Legs brownish yellow ; tips of 

 femora and tarsi barely darker. Wings : venation as in typical 

 Limnobia, except that the auxiliary vein ends just above the 

 origin of the 2nd longitudinal vein, with the subcostal cross-vein 

 at its tip. Colour of wing almost clear, with very numerous very 

 small pale grey spots and short streaks covering the surface ; a 

 very slightly darker grey, just sufficient to be perceptible, over 

 the cross- veins, the origin of the 2nd vein, tip of 1st vein, tip of 



* Trans. Ent. Soc. Loud. 1881, pi. xviii, fig. 8. 



