New Species of Exotic Trichoptera. 303 



spot at the base of the third apical cell, veins dark fuscous, the 

 anastomosis at the base of the fourth apical cell, and at the 

 arculus, as well as the thyridium, hyaline, when viewed against the 

 light ; posterior wings deep orange, the tips broadly fuscous. 

 Habitat, North China. In the British Museum. 



Fam. SERICOSTOMID^. 

 Genus CEconessus, n. g. 



Male. — Antennae about the length of the wings, basal joint 

 short, and rather thick, not so long as the head ; head quadrate ; 

 maxillary palpi oval-elongate, much swollen, curved up in front 

 of the head, their apices, viewed from above, appearing as two 

 rounded tubercles between the antennae, moderately hairy ; 

 labial palpi with the basal joint short, second and third of equal 

 length, long ; anterior tibiae with two short spurs, intermediate 

 and posterior, each with four long unequal spurs. 



Anterior wings rather short and broad, very slightly hairy, the 

 costa much arched, apical margin almost straight ; the costa from 

 the base to the pterostigma is narrowly folded inwards; discoidal 

 cell long and narrow, the ramus thyrifer does not fork before the 

 anastomosis, and from this cause there are only eight apical cells ; 

 the anastomosis is complete and very oblique from the third 

 apical cell, the lower part is not connected with the inner margin 

 by a transverse vein, and the last apical cell is continued from the 

 apex to near the base of the wing, the apical portion being very 

 broad ; near the base of the third apical cell in all four wings is 

 a small round hyaline spot ; posterior wings broad, folded ; dis- 

 coidal cell short and triangular. 



This genus, although very characteristic of the family, differs 

 in a marked degree from all others. The anomalous arrangement 

 of the venation is somewhat extraordinary, even in this family, 

 where singularity of structure appears to be the rule. 



(E. Maori. 



Mas. — Antennis pallide-ochraceis ; oculis nigricantibus vix 

 orichalceo-reticulatis ; capite, thorace, abdomineque rufo-brun- 

 neis; pedibus rufo-ochraceis ; alls anticis ferrugineo-brunneis, 

 confertim albido-irroratis, maculis elongatis ad marginem 

 dorsalem albido et brunneo alternatis ; posticis sub-hyalinis, 

 brunneo-tinctis. 



Long. Corp. 3| lin. ; exp. alar. 10 lin. 



