OF EXTRA- EUROPEAN TRICHOPTERA. 121 



dide nigrum ; Hnea utrinque laterali ochracea ; segmentis apicalibus 

 ventralibus flavo-marginatis. AIjb fuscae, subnitidje, nigro-pube- 

 scentes ; venis piceis ( $ ). 



Long. Corp. 7i lin. (=15 mill.) ; exp. alar. 22 lin. (=:46 mill.). 



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



Head and thorax deep shining black ; eyes greyish ; antennje 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.) 



Eor tlie opportunity of examining and describing this curious 

 insect I am indebted to tbe courtesy of mj friend the Baron de 

 Selys Longchamps, the learned monographer of the Odonata. 



AscALAPHOMERUS, 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- 

 structus : ocelli desunt : palpi maxillares tseniiformes, valde 

 hirsuti, articulo basali brevi, 3° valde elongate, 2o, 4°, et 5" 

 brevioribus ; labiales parvi, graciles : antennae valde elongati, 

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

 datim crassiores, articulo basali brevi. Corpus robustum, 

 breve. Pedes graciles. Alae fere nudae : anticae elongate, api- 

 cem versus dilatatse, margine apicali obliquo ; vense robust^, 

 radio cum sectore prime pauUo ante apicem conjuncto (et in 

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

 permagna, ante alee medium sita ; cellulis apicalibus elongatis, 

 angustatis : posticee 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 



LTNN. JOURN. — ZOOLOGY, VOL. XT. 9 



