250 MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 



Larva. — ''Length, when at rest, 1.1!."> inches (in siiape tiipering slightly troni the middlo 

 forward, but more rapidly from that point l)aek\vard, tlie body deeper than broad). General 

 color bright, clear green, a little .spotted with white, marked as follows: Head gray, a little lighter 

 through the center. Joint 1 contains two dark purplish black warts on the dorsum, reddish puriile 

 at the base, the space between them whitish. From these runs backward a bright, brownish 

 l)urple line, not very dark, at first about one-sixteenth of an incli wide. This expands, reaching 

 the subdorsum in the i)osterior part of joint 4, dividing in tlie middle in joint 3. The line runs 

 along the subdorsal region to the posterior part of joint <), where they unite and cover the whole 

 of the dorsal part of joint 7 and all but a little of the posterior part of joint >S, when it again 

 separates and runs as two lines to the postei'ior pait ot joint 9. The space on the back of joints 

 3, 4, 5, and fl between the i)urple lines is filled with orange. On joint 4 a spur is given oft' from 

 the purple line to the third thoracic leg, another runs from joint G to the lirst pro-leg, another 

 short spur ou joint 9; both of the last with oblique lines of lighter shade, On joint 9 the orange 

 is outside the purple, extending down the lateral spurs. Joint 10 has no purple nor orange, except 

 a little below the stigmata, but it has faint yellow subdorsal lines. Joint 11 has puri)le subdorsal 

 lines which unite on the anterior part of joint 12, continuing backward as a broad dorsal line, 

 darkest on the anal i)latc. The space on joint 11 between the subdorsals is filled with orange. 

 Feet and legs purple, but the rest of the underside green; under the glass the above-described 

 brownish purple lines are not uniform, but mottled with irregular lighter lines." (French). 



From the above description it will be seen that the two prothorainc warts are retained 

 throughout larval life, this, as Dr. Dyar has remarked to us, being the only species in the genus 

 in which these tubercles are retained alter the last molt. This fact shows tliat j}»/re)7>(( is the 

 most primitive species of the genus, but until we discover the first stage of asUivtc it will be 

 premature to construct a genealogical tree of the genus. 



It is evident from the larval characters that this species should be placed below 77. (/nttiritta 

 and H. ohliqna and astarie, while the moth is near II. oWkjiki, with no near attinity to H. f/iittivlfta 

 and hiundata. As it is the only species known to us with the tubercles retained in the last 

 stage, it is most probably the species which Doubleday h:is figured under the name H. athereo. 



Habits. — All that is known with certainty is stated by Professor French as follows: 



TUo single larva from whiih the above description was taken was lonnil .June 30 on the body of a white oak 

 tree. During the few days before it pupated I fed it on the leaves of Qiii'rciis alhii and (f. coccinrn, botli of wliieli 

 it ate readily. July (i it entered the dirt of the cage to transform, and jirodnced the imago August 6. 



In a volume (Gray's copy) of Abbot's manuscript drawings (fig. 117) is a flue colored sketch of 

 II. pidrcren. It has well marked prothoracie tubercles, and is drawn in different attitudes as 

 feeding on Styrux pulverulfjitum. (For stages 1-V see Appendix \,\>. l-'83.) 



Geographical distribution. — Thus far it has not been met with beyond the limits of the 

 Appalachian and Austrori])arian subprovinees. 



Seekonk, E. I. (Mrs. S. W. Bridgham) ; Lou.sdale, E. I. (Dearden) ; Pennsylvania (Grote and 

 Eob.); New York (Grote, Hulst, Neumoegen); Carbondale, 111. (French); S and 9 , Punta Gorda, 

 ■Charlotte Harbor, Fla. (Mrs. Slosson); Georgia, (Abbot). 



Heterocampa belfragei (Grote). 



(I'l. V, fig. 15 J.) 



Hcterocamjm hrlfragri Grote, Can. Ent., xi, p. 209, Nov., 1879; New Cheek List N. Amer. Moths, p. 19, 1882. 

 Litodonta hilfraiiti .Smith, List Lep. Bor. Amer., p. '.M, 1892. 

 Helerocnmjia liclfragci Kirby, Syu, Cat, Lep. Het., i, p, .5(i.5, 1892. 



Nenm. and Dyar, Trans. Amer. Ent. Soc, xxi, p. 200, 1891; .Jouru. N. Y. Ent. Soc, ii, 

 ]i. 117, Sept., 1891. 



Moth. — One $ . This is a true Heterocampa and near H.pulverea, and should not be included 

 in the subgenus Litodonta, although the nature of the female antenna' is not known; it diflers 

 from H. hyrlromdi \\i the outer edge of the fore wings being very obli(iue. Thorax ash-gray; 

 collar with two transver.se black lines; teguliB edged with black. Abroad black transverse tuft 

 ■on the basal segment of the abdomen. 



