374 Rev. L. Guilding on the Natural History of Oiketicus, 



Habit acid am-'' cjlindraceum, utrinque apertum, tilis textum et 

 ramulis foliisque morsis munitum. Larva inetamorphosin 

 subiens (apice semper aperto ad fugam imaginis masculai, 

 et ad nuptias fœminœ), januam clausam filis ad ramum de- 

 ligat, capiteque prono somnum expectat. 



Pupa mascula fronte productâ adminiculis analibus duobus ma- 

 joribus incurvis : segmentis abdoniinalibus série unicâ spi- 

 nularum incurvarum, unicâ recurvarum. 



llemo. India Occidentalis. 



Genus affine Zewzer^l Lat. 



Tijpus gcucricus. Oiketicus Kiibiji, Nobis. 



Oiketicus Kiubyi. 



c?. O. ater purpureo-nitens, alis superioribus elongatis : infe- 

 rioribus angulo anali subproducto ; antennis dimidiato- 

 pectinatis apice serrulatis : tarsis rufescentibus : ore pal- 

 lido. 



? . O. oculis rufescentibus : thoracis squamis corporisque squa- 

 mulis V itellinis : collo anoque brunneo lanuginosis. 



Larva obesa pedibus atris latissimis, propedum musculus retraC' 

 torius apice ferrugineo, spinula; prehensoriœ atrœ recurvœ. 

 Corpus parce pilosum segmentis duodecim, lateribus pro- 

 minulis : anterioribus tribus capiteque rotundato flavescen- 



* The habitaculum or dwelling of the larva of insects must be distinguished from the 

 follicukis or cocoon, which is solely prepared for the defence of the pupa, and closed on 

 all sides. It is observed in the Tineadœ- and other insects, but is commonly of a flat- 

 tened shape. In one Trichopterous .' species known to me it is flattened ovate, open at 

 the ends, and fixed to rocks in rivers. In a species of the family liottjdcc which I have 

 lately detected in vast numbers in our mountain streams, it is flattened, irregular, and 

 attached by the margin and two pillar-like processes to the rocks below the surface of 

 the water. It possesses a semicircular janua for the escape of the imago, and is fenes- 

 trated on the margin. The larva of this curious moth breathes by tracheal branchias ! ! 



tibus, 



