180 MANDIBULATA. — TKICHOPTEllA. 



Hyd. flavomaculata. Pidet, p. 220. pi. x\k. f. 2? — Aph. flavomaculata ? 

 Steph. Nomen. 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, pedihiis ochraceo-fulois, alis subfuscis, anticis 

 immaculatis, aureo-pilosis. (Long. corp. 1| lin.; Exp. Alar. 5|lin.) 



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



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

 ochreous; antennae ochreous, annulated with brown; wings somewhat 

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

 posterior more transparent and iridescent, with brown nervures. 



Found within the metropolitan district. 



Family V.— SERICOSTOMID^ mihi. 



Antennce shortish, robust, with the basal joint enlarged and longish, or slender, 

 with the basal long and very hairy : pal-pi 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 : tibice 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 atone end, and resemble shells belonging to the genus Dentalium. 



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



