102 ZYGMNIDM AND BOMBYCID.^ 



culate wings, which I beHeve to be undescribed, and which is identical 

 with specimens from Costa Rica. A few insects just received from 

 Arizona corroborate this fact, and show that probably many Mexican 

 insects will have to be included in our fauna. 



2.— HALESIDOTA AGASSIZII.* (Pi. i, figs. 8, 9. Pi. lO, fig. 7, larva.) 



Haksidota Agassizii, Pac, Proc. Ent. Soc. Phil., vol. 3, p. 1 28. ( i S64.) 

 Halesidota Californica, Walker. 



Haksidota Angulifera, Walker, Lord's Nat., Brit. Columb. (1866.) 

 PhcEgop/era salicis, Boisduval, Lep. Cal., p. 81. (1868-9.) 



5 . $ . — Head, palpi, antennae and thorax lemon yellow, with the 

 tips of the palpi, two small dots on the prothorax and the inner side of 

 the base of the patagia reddish brown, which color sometimes tinges 

 the thorax. Legs rather darker than the head. Abdomen paler. 



Anterior wings lemon yellow, crossed by four clear reddish brown 

 bands; the first at the base very incomplete; the second narrow and 

 curved outward; the third broad, forking on the fourth median, the 

 outer branch containing a darker cloud on the discal vein; fourth par- 

 rallel with third and outer margin, widest and darkest on the costa. 

 There is sometimes, in addition, a submarginal concolorous series of 

 interspaceal dots. Fringes lemon yellow. 



Secondaries pale, whitish tinged with yellow, immaculate. Beneath 

 paler than above, the markings on the primaries nearly obliterated, 

 leaving only the dark spot on the discal vein, and the costal portion of 

 band four. 



Expanse 0/ wings, 1.65 inches. Length of body, 0.68 inch. 



Habitat. — California, (Coll. Edwards, Stretch, etc., Mus. Comp. 

 Zool. Agassiz.) Nevada, (Coll. Eaves.) British Columbia, (Walker, 

 H. Edwards.) 



The markings on the primaries are very liable to more or less com- 

 plete fusion, so that the identity of the bands is somewhat destroyed ; 

 the second band being fused with the third, the interval usually exist- 

 ing between them being represented by a few pale spots, and the third 

 band, instead of being forked, containing only a pale spot near the 

 costa, (pi. 4, fig. 9.) Specimens from Nevada are large and highly 



* See page 87, ante. 



