V EXTRA* EUROPEAN TRICHOPTERA. 



121 



dide nigrum ; linea utrinque laterali ochracea ; segmentis apicalibus 

 ventralibus flavo-marginatis. Alae fuscae, subnitidae, nigro-pube- 

 scentes ; venis piceis ( $ ). 



Long. corp. 7s h n - (=15 mill.) ; exp. alar. 22 lin. (=46 mill.). 



Hab. Japonia (in Mus. Dom. De Selys). 



Head and thorax deep sinning black; eyes greyish ; antennae blackish; 

 palpi yellowish, clothed with blackish hairs ; prothorax above clothed 

 with black hairs, beneath forming a pale yellow space extending 

 between the anterior coxae, and on each side of these. Legs pitchy, 

 the anterior pair paler, somewhat testaceous ; the knees and spurs 

 testaceous. Abdomen dull black, an ochreous line along each side, 

 and the margins of the terminal ventral segments yellow ; terminal 

 portion beneath flattened, smooth and yellow : vulvar scales large, 

 oval, piceous, lying closely applied to the surface ; beyond these are 

 two acute triangular yellow valves, the tips blackish and extending 

 somewhat beyond the apex of the abdomen. 



Wings uniformly fuscous, somewhat shining, clothed with blackish 

 pubescence, which is more dense on the posterior wings and on the 

 costal portion of the anterior ; in the anterior pair, beyond the ana- 

 stomosis, is an appearance of an indistinct whitish discal space ; the 

 veins all piceous. (PI. II. fig. 8, details.) 



For the opportunity of examining and describing this curious 

 insect I am indebted to the courtesy of my friend the Baron de 

 Selys Longchamps, the learned monographer of the Odonata. 



AscALAPHOMERtrs, Walk. (Cat. Brit. Neurop. pt. 1, p. 79). 



Calcaria 2, 4, 4. Caput : $ oculi permagni, supra fere con- 

 nexi ; $ oculi parvi, distantes ; vertex transversus, cirris in- 

 struct us : ocelli desunt : palpi maxillares tseniifornies, valde 

 hirsuti, articulo basali brevi, 3° valde elongato, 2°, 4°, et 5° 

 brevioribus ; labiales parvi, graciles : antennae valde elongati, 

 in $ breviores, cylindrici, graciles, vel interdum in gra- 

 datim crassiores, articulo basali brevi. Corpus robustum, 

 breve. Pedes graciles. Alse fere nudse : anticse elongatae, api- 

 cem versus dilatatae, margine apicali obliquo ; venae robustae, 

 radio cum sectore primo paullo ante apicem conjuncto (et in 

 al. post); cellula discoidali brevi, occlusa ; cellula thyridii 

 permagna, ante alae medium sita ; cellulis apicalibus elongatis, 

 angustatis : posticae elongato-ovales, anticis fere dimidio bre- 

 viores. 



Head of the S occupied almost entirely by the eyes, which are very 

 large, and nearly confluent above : that of the $ with the eyes 

 small; the vertex transverse, furnished with large tubercles, whence 



LINN. JOURN. — ZOOLOGY, VOL. XI. 9 



