RHYACOPHILID/E. — GLOSSOSOMA. I6l 



intermediate tibiae with a pair of shortish spurs in the middle, and a second 

 pair at the apex, posterior also with a pair at the apex, and a second pair 

 near the apex ; of the female the intermediate tibiae and basal joint of their 

 tarsi are considerably dilated. 



This genus may be known at once by all the wings being furnished 

 with a somewhat lozenge-shaped areolet, towards the apex of the disc, 

 and the anterior pair in the males having an elevated callous mem- 

 brane near the base ; the terminal joint of the maxillary palpi is not 

 longer than the preceding, the legs are slender, but the female has 

 the intermediate tibife and the basal joint of their tarsi dilated and 

 compressed : the abdomen of the males is armed with two horny 

 lobes beneath, as represented in the left hand figure (1. pi. xxxii.) 



■fSp. 1. Boltoni. Fusco-castamea, abdominis apice pedibusque ocfiraceis, ulis- 

 pallidt j'ascescentibus, anticaruin apice maculis obscure ochraceis. (Long, corp, 

 4? lin.) Exp. Alar. 10 lin.) 



Gl. Boltoni. Phil. Mag. (Curtis) v. iv.p.2l6. — Sfeph. Nomen. 2d edit Appendix. 

 — Rhy. vernalls. Pictet, \m.pl. xv.f, 4 ? 



** Antennas, head, thorax, and abdomen fuscous-castaneous, the former annu- 

 lated with, and the latter tipped with ochreous ; wings pubescent, pale 

 fuscous ; superior (anterior) with the callous lump at the base in the male 

 brown, clothed with black hairs ; stigma and a spot opposite on the inferior 

 margin fuscous, and each nervure terminated by a spot of the same colour 

 on the margin alternating with ochreous spots, with an indistinct row 

 behind them, and two or three near the disc of the same colour; inferior 

 (posterior) wings grey and transparent at the base." — Curtis, I. c. 



The locality of this insect is not stated. 



Sp. 2. fimbriata. Platk xxxii. f. 1. — Piceo-fusca, capite abdominis apice 

 pedibusque ochraceis, alis pallide fuscescentibus immaculatis. (Long. corp. 

 2i— 3 lin.; Exp. Alar 5| — 7 lin.) 



Ti. fimbriata. Steph. CfituL 316. No. 3563.— Ti. simplex. Sieph. Catal. 316. 

 No. 3564 9. 



Head ochreous, eyes and palpi fuscous ; thorax and abdomen pitchy-brown or 

 dusky-chestnut, the apex of the latter ochreous ; wings pubescent, uniform 

 pale fuscous, and wholly destitute of spots; stigma and iiervures a little 

 darker, anterior with the callous spot at the base fuscescent, darker towards 

 the disc ; posterior wings rather paler and more transparent ; legs and 

 antennae ochreous, the latter annulated with pale fuscous. 



Found, but rarely, near London ; also taken in Scotland by the 

 late Dr. Walker. 



Mandibui.ata, Vol. VI., August 15th, 1836. x 



