BOMBYX. — ECTROCTA.. 33 



medial line. Hind wing with a dark blotch at centre of inner 

 margin ; curved medial and postmedial lines. 

 § with the wings often more or less aborted. 



In some specimens the outer line of the fore wing is curved and 

 submarginal, or the markings may be entirely obsolete. 



Larva dark grey ; the head and first three somites with some 



transverse black lines ; the first somite with two dark red streaks ; 

 the five first somites white below ; the 3rd to anal somite with 

 reticulated black dorsal markings ; 11th somite with a long horn. 



Cultivated forms may be grey or almost white, with the markings 

 almost obsolete. 



This species is indigenous to China, and from there introduced 

 all over the world. The forms described by Hutton are simply 

 domesticated races of the larva. 



Cocoon yellow or white, the silk closely woven or loose. 



Hah. China, and in a domesticated state throughout India and 

 Europe. Exp. 42 millim. 



Genus ECTROCTA, nov. 



Type, E. diaphana, Hmpsn. 



Range. Burma. 



Palpi minute. Fore wing much excised below the apex ; veins 

 6, 7, 8, 9, 10, 11 stalked together ; veins 7, 8, 9 not much bent 

 downwards. Hind wing with the outer margin much excised at 

 anal angle ; vein 5 from the centre of the discocellulars ; veins 6 

 and 7 stalked. 



35. Ectrocta diaphana, n. sp. 



$ . Head, thorax, and abdomen pale ochreous brown, suffused 

 with fuscous. Wings semidiaphanous white. Fore wing with a 

 fuscous basal patch ; a subbasal curved fuscous band ; a streak on 

 discocellulars ; a doubly curved submarginal line ; a large apical 

 patch. Hind wing with an antemedial fuscous spot on inner 



VOL. I. D 



