MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCE^. 83 



A larva of this species, eviflently in stage IV, was collected at Brownsville, Tex., by Mr. 

 Jacob Doll. We add a description of it. 



Stage /F(P1. Ill; fig. 2«). — Length, 30 mm. The head is as in the fully grown larva aJ)ove 

 described, but in the blown specimen it is not so green, and the lateral j^ellowish line is not so 

 distinct, though more j'ellow towards the base of the antennte. 



It dili'ers in this from the last stage in the prothoracic tubercles being a little longer in pro- 

 portion. The eight thoracic horns are slendei'er, with decidedly longer spinules, which are 

 mostly black, the tips rounded. The dorsal and subdorsal spines are much as in stage V in size; 

 they are white externally and pale reddish on the inside along the middle, the ends being white. 

 On the sides of abdominal segments 2, 4, R, and 7 a yellowish streak connects the subdorsal spines 

 with the lateral reddish line. 



The caudal horn is now not so long as the body is thick, being a little shorter in proportion 

 than in the fullj' grown larva; it is erect, thick at the base, and the rather crowded spinules 

 bear long seta'. 



The suranal plate does not bear on the edge so many or so crowded tubercles as in the final 

 stage (tig. 'Id). The integument bears a few .scattered minute white tubercles, but not nearly 

 so many as after the last molt. 



A lateral dull Venetian red line, shaded on the lowei' side with yellow. The general hue of 

 the blown specimen is yellowish green. 



Two specimens from Tucson, Ariz., collected by Charles Bendire, and now in the Museum 

 of Comparative Zoology, Cambridge, Mass., were compared with the San Antonio blown larva. 

 Thej' agree with it in the slenderness of the dorsal and subdorsal abdominal spines, and in the 

 numerous secondary tubercles or granulations on the sides of the segments. The eight thoracic 

 horns and the caudal horn are nearly identical, though the spimiles on the latter are slightly 

 shorter than in the San Antonio example. There seems no doubt at all that the larv;v fro:n these 

 two localities are of the same species. 



Of the two Tucson larva^ one has more lateral secondary tubercles than the other. 



In the Tucson larvai the thoracic and caudal horns are decidedly cherrj' red, with the tips 

 paler. 



In two examples from Brownsville there is some variation in the size and length of the spines 

 of abdominal segments 1-7. The caudal horn is a little shorter than in the U. S. National 

 Museum specimen, as are the dorsal abdominal spines. 



The suranal plate is the same in the size and number of the tubercles. The two Brownsville 

 examples diifer among themselves, the dorsal and caudal horns being shorter in one than the 

 other. 



The larva of stage IV is represented on PL III. tig. 'l<r. also the details of the armature on 

 trunk segments 1-6, on PI. XLIX, figs. 2; the caudal horn and suranal plate at fig. -Id. Figs. 

 2«, 25, and 2f represent the armature of the last stage; -It-, a tergal view of the suranal plate. 



A.r)ELOCEFHJb.L^ BOISDUA^^LII Douiiiet. 



Addocephala boisduiaUi Doumet, Revue et Mag. Zool., 1859, p. liGti (<?). 

 Olhorene mexicana Boisd., .4nn. Soc. Ent. Beige, XV, p. 84. 



Adelocephala boisdiivalii Drvce, Biol. Centr. Amer. Het., I, p. 171. .Iimo, ISSfi. — PI. — , fig. — . Kikhy, Syn. 

 Cat. Lep. Het., I, p. 741. 1892. 



Imago. — 1 $ . A large species, larger than ^1. hi'igd. with the apex of the fore wings more 

 acute, the costa straight, the outer edge less full, more obliijue than in A. hlsecta and A. hi'xiri. 

 The antenna^ are slightlv wider than in Jdigei; al)Out 20 pairs of pectinations, and 25 short ones 

 on the filiform tip. Head, body, and wings uniformlv bright lemon yellow, with no dark spots 

 or stigma. Fore wings with no distinct basal line; the extradiscal line very oblique, not wavy, 

 narrow, brown, and ending on the apex of the wing. Two di.scal spots, snow-white, the hinder 

 one subtriangular or distinctly triangular: the anterior spot smaller (nearly obsolete in my 

 example). The base of the fore wings is a little pinkish, and the fringe is pale lilac on the outer 

 and inner edges. 



