370 WILLIAM T. M. FORBES 



7. Stripes on segment 4, or on 2, 4, and 6, much stronger; hind 

 tibiae largely black. 



8. Metatarsus black; moth smaller 13. decipiens. 



S. Metatarsus yellow; larger 22. sigmoidea. 



1. C. exitiosa Say. Male with palpi black above and yellow below; antennae 

 black ; a yellow tuft on vertex, as a rule ; front black. Abdomen with variable 

 fine yellow stripes. Hind legs black, narrowly yellow-ringed at spurs, and on 

 segments of tarsi. Fore wing with border, aside from fringe, much narrower 

 than an interspace; all cells below R, hyaline. Scaling wholly black. Anal tuft 

 lanceolate, the scales narrowly white-tipped. Female with fore wings, costa of 

 hind -wings, including base of cell, and body and legs purple-black. A red band 

 across middle of abdomen, typically covering one segment (but two in var. 

 edwardsii Beutenmiiller). 20-30 mm.; female larger ($ fitchii H. Edwards). 



July and August. Larva (the peach-tree borer) in the sap wood of peach, 

 plum, and other Rosacese, usually close to the surface of the ground; often inju- 

 rious in peach orchards. Pupation in a cocoon, rarely outside the burrow. 



Generally distributed in the range of its food plant. New York: Buffalo, Ithaca 

 and vicinity, Albany, New Windsor, Staten Island; Brooklyn, and Jamaica, Long 

 Island. Var. edwardsi Beutenmiiller is commoner than the typical female about 

 Ithaca and also occurs at Phelps (Ontario County). 



In aberration luminosa Neumcegen, the head, most of the abdomen, and the costa, 

 and part of the veins of the wings are bright golden yellow. 



In the remaining species the sexual dimorphism, though often marked, is never 

 as striking as in exitiosa. 



2. C. rubrofascia H. Edwards. Blackish; mid-tarsi and last four segments of 

 hind tarsi whitish; abdomen with two middle segments dull red. Fore wing of 

 male hyaline, with blackish discal bar, and border extending halfway in to cell, 

 leaving five hyaline cells. Hind wing with only the extreme edge blackish; the 

 cell all hyaline. Anal tuft lanceolate. 22 mm. 



South Carolina; Georgia; also very probably in our area. New York: reported 

 from New York City. 



C. culiciformis Linnaeus, from birch, and the very similar C. americana, from 

 alder, are definitely known only from the Rocky Mountains to the Pacific Coast. 



3. C. bolteri H. Edwards. Almost like male of C. rubrofascia; tip of fore wing 

 red between veins; hind tarsus wholly blackish on outer, and paler on inner, side; 

 sexes similar. 15-21 mm. 



Larva in solid wood of willow, well above ground. 

 Illinois. New York: Ithaca, Big Indian Valley, Mosholu. 



4. C. pyralidiformis Walker. Blackish. Palpi yellow; fore wing obscurely hyaline 

 at base and beyond cell in male, but not forming distinct spots; wholly opaque 

 in female; hind wing like C. rubrofascia. Body fuscous, with a broad yellow band 

 on fourth segment, and fine bands on second and sixth or seventh segments some- 

 times (usually in Illinois) with the three bands nearly equal. Legs blackish; a 

 yellow spot at upper spurs, and last four joints of tarsus pale. Tuft as before, or 

 spread f anlike ( nigella Hulst ) . 



Long Island, New York, to Illinois and Texas. New York: Fairport, Batavia, 

 Staten Island; Amagansett and Woodhaven, Long Island. 



5. S. sanborni H. Edwards. Blackish; palpi largely yellow; fore wing with a 

 nearly round hyaline spot beyond cell, covering three cells, and a slight trans- 

 parency at base. Border of hind wing rather wider than usual. Body with yellow 

 stripes on segments 4 and 6. Female type only known; without hind legs. Pos- 

 sibly an aberration or a northern form of pyralidiformis. 



Massachusetts. 



6. C. rutilans H. Edwards. Palpi, occiput, and two stripes on thorax yellow. 

 Segments 2 and 4 of abdomen with posterior half yellow, 6 a little more nar- 



