180 MANDIBULATA. TRICHOPTERA. 



Hyd. flavomaculata. Pidet, p. 220. pi. xix. f. 2? — Aph. flavomaculata ? 



Steph. JVomen. 2d edit. Appendix. 



Dusky-brown : head densely clothed with short griseous hairs ; antennse 

 ochreous, annulated with brown ; abdomen with the margins of the seg- 

 ments pale ; anterior wings griseous- or tawny-brown, more or less 

 obscurely freckled with yellowish, or ochreous, the nervures darker; 

 posterior wings more transparent, iridescent and immaculate ; legs tawny- 

 ochreous. 



The anterior wings are sometimes totally destitute of luteous spots, as in the 

 individual whence the figure was taken. 



Apparently rare, or rather very local : found in June in Devon- 

 shire, near Plymouth. 



Sp. 2. subaurata. Brunnea, pedibus ochraeeo-fulvis, alis subfuscis, anticis 

 immaculatis, aureo-pilosis. (Long. corp. If lin.; Exp. Alar. 5f lin.) 



Ti. subaurata. Steph. Catal. 317. No. 3578. 



Brown : head pale, clothed with short griseous hairs ; legs pale tawny- 

 ochreous; antennse ochreous, annulated with brown; wings somewhat 

 fuscescent, the anterior clothed with a short golden pile, immaculate; 

 j)osterior more transparent and iridescent, with brown nervures. 



Found within the metropolitan district. 



Family V.— SERICOSTOMIDiE mihi. 



Antennm shortish, robust, with the basal joint enlarged and loiigish, or slender, 

 with the basal long and very hairy : palpi dissimilar in the sexes ; maxillary 

 in the males triarticulate, with the terminal joint clavate or pilose, or spoon- 

 shaped, and forming by their union a kind of mask ; in the females they are 

 five-jointed, the terminal joint being slender ; the second joint, in both 

 sexes, rather long : wings long and narrow, sometimes very pilose, almost 

 wholly destitute of transverse nervures, and the longitudinal ones not very 

 distinct : posterior wings small, and but slightly folded on the inner margin : 

 abdomen rather stout, the apex of the males armed with horny appendages, 

 and of the females obtuse : legs moderate : tibi(B mostly armed with spurs 

 at the apex, the two hinder pair each with a pair above the tip. 



Larva robust, short, slightly attenuated to the apex, which is truncate, and 

 furnished with short terminal processes; head and following segment 

 scaly, the remainder soft and fleshy : in some instances the anterior angle of 

 each thoracic segment is acutely pointed, in others rounded ; legs rather 

 slender, hinder pair short : the larva resides in double flat cases, to which 

 pieces of stone, &c. are fastened; or in slightly curved ones, which are 

 attenuated at one end, and resemble shells belonging to the genus Dentalium. 



The insects of this family are generally of moderately large size, 



