23-1 



MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



Fig. 81 Pupa of S. guttivitta. 



body. 



cT. End of 



a large oval wliitlsh spot on X\w second and loiiith abdoiniual segments, and ending on tlie binder 

 edge of the fourth, and beginning again on the tifth, then separating agiarn so as to inclose a long- 

 oval dorsal space on abdominal segments 5 to 8; then contract- 

 ing and ending ou the suranal plate between the bases of the 

 anal legs. 



The oval white spots inclose two parallel faint reddish median 

 lines. The body is somewliat comi)ressed, tapering to the end; 

 the anal legs are long, outstretched, slender, with a reddish line 

 on the outside and cherry-red at tips. Sides of the body flesh - 

 colored, with reddish dots and short lines. Thoracic legs pale, 

 with a cherry-red stripe on the outside. The middle abdominal 

 legs pale flesh, with a few short wavy reddish-piuk lines and 

 specks ou the outside. ' 



PI. XX XIII, tigs. 2, 'la, represent a larva from which I reared 

 the moth, a female of normal appearance. 



Pnpa. — Body rather stout aud thick, the head rounded, much 

 as usual, coarsely corra.iiated, with two very faintly indicated low 

 parallel vertical ridges between the eyes. The abdominal seganents are sparsely and not very 

 coarsely punctured ; the last three segments as usual, smooth and polished. Behind the uieso- 

 scutum are six square, flattened, dull, unpolished, black tubercles, not having any median impres- 

 sion to give them a double iippearance (like that of Schiziira Jeptinoideii). The cremaster ends lu 

 two stout spines, which are larger and stouter than iu H. biundata, 

 and of quite ditt'erent shape, the terminal spine being broad and some- 

 what foot-like, the end being square, with the heel pointing inward 

 and the toe upward at right angles to the main spine. Vestiges of 

 the anal legs rather prominent, rounded, smaller than in H. hiundnta. 

 Vestiges of the sexual opening longer than in H. biundata. Length, 

 ly mm. 



Habits. — The eggs were found at Bruuswick, Me., as early as 

 July 3, and it hatched July 11 or 12. Other larvfe, as observed iu 

 Maine, hatched about the Sth to 10th of July, feeding ou the underside 

 of the leaf, at first eating away a little irregular patch. Stage I lasts 

 nine days, Stage II probably four or five days. The last stage is 

 reached a month later, August 9-10; my belated individual occurred on the oak at Providence 

 as late as September 20 to 24. The larva has the habit of jerking its head rapidly from side to 

 side, as if vexed or to scare away some assailant. 



' Dr. Dyar sends me the following account of a variety of C. ijnttivitta larva (mature) : 



"I have twice fo-unil a peculiar variety of giittiiulta (one at Woods Holl, Mass., oae at .Teffersoa, X. H.), iu 

 which a large brown dorsal patch was retained in the last stage. The following is a full description of it: 



"Head oval, higher th.au wide, flattened iu front, smooth, green ; a purplish hand on a whitish ground, preceded 

 by a narrow black line from base of jaw to vertex, joining the one or the other side; a short, similar baud ou the 

 posterior lateral angle of the liead at ventral side; ocelli and jaws black; palpi yellowish; width about 3.5 mm. 

 Body smooth, the miunte, black, normal set:e arising from whitish spots; anal feet sltmder, slightly used. Body 

 slightly smaller at the extremities, appearing enlarged centrally in the usual jjositiou of the Jarva. A bro.ad white 

 sulidorsal band, narrowly black-bordered above, broken on joints 2 and 11. Dorsal area yellowish green, lateral 

 area leaf-green, brown-dotted, spiracles salmon color. Ou anterior edge of joint 2 a narrow yellow line, containing 

 two purple-brown spots. A narrow white dorsal line edged with black, linear to joint 4 ; on joint 5 it divides into 

 three, all coming together again ou joint S, forming ^n elliptical area; on joint !1 it again divides, each .side branc h 

 joining the subdorsal line on joint 11 posteriorily to the break, the central line running to joint 13. These lines are 

 yellowish white, scarcely black-bordered posteriorly to joint 4. Besidt'S these normal miirkings are the following 

 dark purple brown patches: (1) a narrow obliijue linear subventral patch on joint 4 from base of foot nijward and 

 backw.ard; (2) a subdorsal pyriform patch ou joint 7 between the dorsal and subdorsal lines; (3) a single dorsal 

 cordate patch, the depression anteriorly, situated on joint 8, dividing the dorsal line and barely reaching the 

 subdorsal. In front of this heart-shaped spot the junction of the dorsal lines forms a white spot. In the second 

 example these brown patches were somewhat larger, and there was in addition a subventral patch above the foot ou 

 joiuts 7 aud 10, the latter sloping the other way from the oae ou joint 4." 



Fig. 82. — Pupa of Heterocamjm gutti 

 ritta. 9- ■^i'- fpiracle. 



