lyS MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



tbey are of the same blood red line as tliose on the first sejjnient. The small dorsal tnberclcs on 

 the set-ond and third abdominal segments are minnte and yellow; tliosc on the foiuth aie partly 

 blood-red. The anal lej^s are long and slender. On the back of the abdominal segments 1-4 is a 

 ])orcelain white band, bordered with faint yellow, and divided by the sutnres; the portion on the 

 first segment behind the tubercle is triangular, that on the fourth round; they each contain three 

 deej) pink lines more or less broken and irregular. The V-shaped inark consists of a white oval 

 (acute in front) spot on the sixth segment, and the two ai'ms ot the V are formed by two converging 

 oval spots, with a yellowish white spot between the forks. The thoracic legs are pale flesh, the 

 middle abdominal legs of the color of the leafstalk, while the anal legs are paler. Beneath, the 

 body is green on the three thoracic segments, this color being continued back as a narrow band 

 to the first pair of abdominal legs; otherwise much as on the sides of the body. 



Larvft coiiijKirrd irith that of tS. iiiiirornin. — Dilfers from C. unicoriiiii in the head Iteing purjde 

 and having four dark narrow lines extending fiom the base of the jaws to the vertex; the dor.sal 

 spine on the lirst abdominal segment is nearly three times as large and liigli as in G. unicornis, 

 and ends in a deep fork, each tine of which l)ears a stiff truncated spine. A pair of dorsal, 

 rouiuled, small tubercles on each abdominal segment 1-8, those on the fifth and eighth segments 

 being much larger than the others and coral red in color. Coloration much as in C. unicornis^hut 

 the branches of the V in front of the tubercle on the eighth segment are wider and inclose a 

 broken red line. iMeso- and metathoracic segments green; body brick-reddish, slashed with i)ale 

 lines, with a broad dorsal band forked on the prothoracic segment and extending upon the horn 

 on the first abdominal segment; behind the horn are four dorsal, oval, light patches, each inclosing 

 three red lines. 



Cocoon. — Earthen, regularly oval in shape, externally covered with sand, so that it closely 

 resembles that of X;jli)W(les Vignicolor. (Kiley.) 



"The single specimen of the cocoon of this species in tlu; national collection was constructed 

 in a sandy soil, and is extremely thickly covered with particles of sand, entirely concealing the 

 silken inner structui-e, which seems to be somewhat more copious and dense than in the case of 

 (S'. unicornis. The cocoon is elongate oval, measuring about 1*2 mm. in greatest diameter." (lidey 

 MS. notes.) 



Pxipa. — Moderately stout; end of abdomen obtuse. The cremaster deeply cleft, each spine 

 well developed, rather long, not nnich flattened, ending in a point, and throwing olf near the end 

 a short branch which nearly meets its fellow on the opposite si)ine. Length, 21 mm. 



Two $ . Body not very stout (head uot preserved in any cast shells), snu)otli. sliining. 

 Hinder edge of the thorax with eight square, dark tubercles, with rudiments of a ninth. 

 Abdominal segments 5 to 7 shagreened on the hinder edge, and segments 6 to S punctured 

 (these punctures acting as ball bearings?). Cremaster ending in two stout si)ines forked at 

 the end, much larger than in S. unicurnis, and transversely corrugated. Length, 18-Ht mm. 

 (U. S. Nat. Mus.) 



JJahilx. — The following notes and descriptions are based on an examination of the material in 

 Professor Kiley's collection. The larva occurred on the oak Sei)tember 24. In Virginia one was 

 found by Mr. Koebele on the birch September 14, and it has also been bred f:om the blackberry. 

 The larva makes an earthen cocoon, regularly oval in shai)e, covering it with sand on the outside, 

 so that it closely resembles that of .Vi///»(w/('s lifpiicoJor. C iniirornis spins a silken cocoon, with 

 debris collected and adhering to the exterior. It is evident that C. cincreofron.s Pack, is only a 

 variety of bidutfata, there being a series of connecting forms in Kiley's collection now in the 

 United States National I\Iuseuni. The moth occurred at Cand)ridge. ^lass., June 10, and in July 

 and August. (Harris.) 



"LarviT of this species are found from May to October at St. Louis, Mo., feeding on the 

 difl'erent kinds of oak ami on maple. The motiis issiu'd in Ai)ril and August. The coloration of 

 the larva' is quite varnible, though the most unilbrm marking is as follows: Color, green, sjieckled 

 with purple. A faint substigmatal sulphur-yellow line, most distinct on thoracac joints. A broad 

 pale subdorsal line, between which the dorsum is ])ale lilaceous, but thickly mottled with rich 

 purple-brown and ferruginous, leaving a narrow dorsal line distinctly marked. Two elevated 



