194 



THE CANADIAN ENTOMOLOGIST. 



One specimen, bred from a long whitish serpentine mine on 

 the stem of dogbane (Apocynum cannabium L.). The larva leaves 

 the mine to pupate, and spins the characteristic white cocoon 

 ornamented with pearly globules. Mine collected near Cincinnati, 

 July 3, at which time the larva was nearly full grown. Imago, 

 July 21. 



This species comes very close to Marmara salicteUa Clem., 

 from which it may be distinguished by the yellow head, more oblique 

 median fascia and smaller size. 



Cystioecetes, new genus. 



Head with appressed scales; ocelli present; tongue de\eloped. 

 Antennae 7^3, outer half very shortly bipectinate and ciliate in 



both sexes, basal seg- 

 ent rather long, without 

 pecten. Labial palpi 

 long, recurved, second 

 segment thickened with 

 scales, terminal segment 

 shorter, thickened with 

 scales, apex a CvU t e . 

 Maxillary palpi \er\- 

 short, appressed to 

 tongue. 



Posterior tibiae rough-haired above on the posterior half. 



Fore wings with large tufts of raised scales; lb furcate, 

 2 from three-fourths of cell, tubular onh- near the margin, 4 from 

 angle, 6 out of base of stalk of 7 + 8, 11 from middle of cell. Hind 

 wings 2/5, narrow lanceolate, cilia 5; 2 - 4 nearly parallel, 4 and 5 

 connate, 5 and 6 parallel, 6 and 7 approximated at base. (Fig. 21). 



Type: Cystioecetes nimbosus. 



This genus is closely related to Chrysopeleia Cham., which it 

 \'ery closely resembles in type of markings; the antennal and palpal 

 characters are identical. In Chrysopeleia vein 2 of the fore wings 

 is absent, and 6 is' out of 7 beyond 8; the venation of the hind wings 

 differs only in the stalking of 6 and 7. It appears to bear some 

 resemblance to some Australian genera in antennal structure and 

 in neuration of the hind wings. 



Fig. 21. — \'enition of Cystioecetes nimhosiis. 



