Species of Eriocera in the British Museum. 81 



genital tube (stenasygos) enters tlie chitinised sac. The 

 apodeme seems to be analogous to, though it may not 

 correspond morphologically with, the median strut of Sharp 

 and Muir. It is niost developed in those species with a short 

 penis. It seemTS probable that this cliitinised sac corresponds 

 rather with the median lobe than with the internal sac of 

 tlie Coleoptera. In that case, the slender tube connecting 

 the sac with the tip of the penis must be regarded as the 

 permanently invaginated distal portion of the first connecting 

 membrane, and the penis itself as a special ehitinisation of 

 the proximal portion of this same " membrane." 



Descriptions of neiv Species and Varieties. 



1. Eriocera yerburyi, sp. n., ,^ . 



Head ochreous, the proboscis, scape of antennae, and basal 

 joint of palpi of the same colour ; rest of palpi, audflagellum 

 of anteuuse except base of first jo.nt, blackish. Frontal 

 tubercle very large, simple. First scapal joint considerably 

 swollen, about twice as long as broad. Flagellum four- 

 jointed, a little more than twice as long as the thorax ; 

 numerous bristly hairs on the underside. Fourth joint of 

 palpi about as long as the two preceding together ; first 

 joint a little shorter than the fourth. Thorax dull blackish, 

 with a slight grey dusting; praescutum with two giey stripes 

 and a median grey line faintly indicated. Pubescence 

 yellowish^ short and sparse. Abdomen uniformly b'ackish 

 brown, shining, about twice as long as the thorax. 

 Hypojtygium : ninth tergite with a broad V-shaped terminal 

 emargination. Side-pieces simple, nearly cylindrical, but 

 somewhat curved, about 2*5 times as long as broad. Outer 

 clasper without long hairs^ finely pubescent at the base and 

 on the inner side a little before the tip, which is rather 

 suddenly narrowed but gently curved. Inner clasper broad, 

 hairy, with deep groove for reception of outer clasper, 

 separated from the latter down to the extreme base ; tip 

 somewhat produced inwards. Parameres bilobed ; dorsal lobe 

 conical, sharply pointed ; ventral lobe broad, somewhat 

 narrowed towards the rounded tip. Dorsal plate slightlj'- 

 emarginate apically. Penis much shorter than the mesosome, 

 broad at the base, terminating in two long points. Leys 

 rather long and slender, dark brown, extreme tips of all 

 joints black. Claws with small basal tooth; empodium 

 nearly as long as the claws. fViiiys light brown, veins and 

 stigma darker, Sc ending distinctly beyond apex of Ks. 



Ann. & Mag. N. Hist. Ser. 9. Vol. viii. 6 



