16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



diffuse. This latter type predominates among the northern specimens 

 and makes a strong approach in appearance to portlandia, though the 

 ordinary spots are always wanting, so far as my experience goes. 



LARVA. 



LiNTNER, Twenty-si xtb Rept. N. Y. State Cab. Nat. Hist., 1872, p. 132, tig. 7.— 

 Thaxteh, Papilio, 1883, III,p. 11.— Fernald, Stand. Nat. Hist., 1885, II, p. 

 453.— Packard, Fiftli Kept. U. S. Ent. Comui., 1890, p. 774, pi. xi, fig. 8. 



8tage VI. — '' Head large, rounded, reddish. A pair of stiff spike-like 

 tufts of hair, reddish at base, blackish at end, arise from the dorsal 

 tubercles (of joint 2); a pair one third as long (on joint 3). Body and 

 hairs pale rust red ; a lateral irregular whitish stripe, sending prolonga- 

 tions uiDward; an interrupted dorsal whitish line. Legs reddish." 

 (Packard.) 



Stage VII. — Head white, so thickly dotted with light reddish as to 

 appear of that color; an irregular vertical white line on each side of the 

 median suture and a transverse one on ocelli. Warts distinct, normal; 

 a few secondary hairs, especially subventially. Hair black from warts 

 I to III, pale brown V, VI, all fine and rather short. From tubercle I 

 on joints 2 and 3 and from II on 5 and 12 a distinct black pencil. Body 

 light pinkish brown, whitish dotted; warts orange; an obscure white 

 dorsal line and distinct snbstigmatal one excised at the spiracles; an 

 undulating row of black dots laterally, four per segment. Spiracles 

 white surrounded bj^ a smoky black shade. Venter and legs rather 

 pale. Another form is "glossy black, sparsely clothed with tufts of 

 white hairs. Hair pencils clear white or tinged with olive. A lateral 

 (snbstigmatal) row of white spots extending superiorly and anteriorly 

 just below the stigmata." (Thaxter.) 



Food plants. — Larch, pine. 



, PANTHEA GIGANTEA French. 



(Plates IX, tig. 2, male; tig. 3, femak^ adult; XIX, fig. 3, male genitalia.) 



Plaiyceriira f/igantea French, Can. Ent., 1890, XXII, p. 134. 

 Panihea gigantea Smith, List Lepidoptera, 1891, p. 34. 



Ground color whitish, so heavily black powdered that it seems black, 

 w.th a powdering of white scales and hair. This also gives the wings 

 a somewhat seniitransparent appearance. The thorax is crossed by 

 two rather indistinct transverse black bands, which are hardly relieved 

 against the dark background. Primaries with the transverse lines 

 single, black, and well defined. Basal half line present, but hardly 

 traceable below the costal area. Transverse anterior line rather nar- 

 row, even, sharply defined, almost rigidly upright, and marked by a 

 few preceding pale scales. Transverse posterior line even, black, well 

 defined, evenly obli(|ue from costa to vein 4; then with an even, well- 

 marked incurve to the inner margin. This line is followed by a whitish 

 shading. Median shade line less evident and narrower than the 



