Packard.] ^*^ [March 17, 



iucluding the median suture, while there are two areas on each side con- 

 taining the black dots, the lower group situated behind the eyes. The 

 3'ellowish-white dorsal, median, exclamation marks are on a black field. 

 The broad, now very distinct sky-blue subdorsal line is irregularly edged 

 Avith black and above and below with a distinct, ochreous, wavy line. 

 The blue line is, on the second and third thoracic segment, interrupted 

 by a conspicuous square black spot, and a similarly situated black dot in 

 the middle of each segment appears on the lower edge of the blue band, 

 being a local dilatation of the lower black edging of the blue band. The 

 eighth abdominal segment is slightly humped, and on the side the sub- 

 dorsal blue band ends in a squarish black spot. The two lower ochreous 

 lateral lines are distinct, the lower one extending along the base of the 

 legs. The hairs are now snuff-colored ; those on the sides, low down, 

 being mixed with whitish ones. 



Stnge IV(1). — May 18 it molted again, its length being 18-31 mm. It is 

 now quite different from the former stages. The yellowish-white excla- 

 mation point is now less distinct, the dot often obsolete, and the mark is 

 now ochreous and white in the centre. The previously black dorsal 

 band enclosing the median series of exclamation marks is now partly 

 filled with blue specks, and contaim tracea of a much interrupted wavy, 

 deep reddish ochreous line. The lateral blue lines and sides of the body 

 in general are scarcely different from the former stages, though the red 

 thread lines are deeper in hue. The hairs above and on the sides are now 

 rather denser and more decidedly snuff yellow (the short, red, wavy 

 lines in the dorsal spaces arc new to this stage). 



Final Stages of Clisiocampa tuouacica (Stretch). 



Received living from Mr. Ricksecker, May 5, having been fed on wil- 

 low. Length, 28-30 mm. This belongs to the same stage as that de- 

 scribed May 18, in my notes, but the dot of the exclamation mark is less 

 distinct, the markings are more distinct, and the larva is larger, and they 

 feed better. The blue and snuff or deep ochreous wavy spots and short 

 lines are more distinct. Of the very irregular blue spots there are three 

 on a side of the dorsal space on each segment enclosed by the subdorsal, 

 reddish, ochreous lines. The second or lateral line is now, instead of 

 being reddish ochreous, decidedly yellowish ochreous. May 27, one has 

 molted to the last (?) stage. This larva is interesting as passing through a 

 sylvatiea stage with its dorsal exclamation mark. 



The following description is drawn up both from living specimens and 

 blown ones loaned by Prof Rivers and named thoracica by him. 



Full-fed Lr/roa.— Length, 45 mm. Head deep blue, with two series of 

 fine black dots along the top, and another broader series along the sides ; 

 with a clear bluish space between. The prothoracic or cervical shield is 

 more distinct than in any others of the California species which I have 

 seen, as it is freer from hairs and marked with blue ; it bears two black 



