198 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



tbey are of tlie same bloodied Ime as those on the tirst segment. The small dorsal tubercles on 

 the second and third abdominal segments are minute and yellow; those on the fourth are partly 

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

 porcelain white band, bordered with faint yellow, and divided by the sutures; the portion on the 

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

 deep pink lines more or less broken ann irregular. The V-shaped mark consists of a white oval 

 (acute in front) spot on the sixth segment, and the two arms 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 baud 

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



Lurra compared u-ith fluif of »S'. «»/r'orH /.v.— Differs from C. unicornis in the head being purple 

 and having four dark narrow lines extending from the base of the jaws to the vertex; the dorsal 

 spine on the first abdominal segment is nearly three times as large and high as in C. unicornis, 

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

 rounded, 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 niucli as in C. iinieornis, hut 

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

 broken red line. Meso- and metathoracic segments green; body brick-reddish, slashed with pale 

 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 XyUnodes lignicolor. (Riley.) 



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

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

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

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

 MS. notes.) 



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

 well develoi)ed, rather long, not much flattened, ending in a point, and throwing oft' near the end 

 a short branch which nearly meets its fellow on the opposite spine. Length, 21 nmi. 



Two 5 . Body not very stout (head not preserved in any cast shells), smooth, shining. 

 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 G to S punctured 

 (these punctures acting as ball bearings!). Cremaster ending in two stout spines forked at 

 the end, much larger than in *S'. unicornis, and transversely corrugated. Length, 18-19 mm. 

 (U. S. Nat. Mus.) 



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

 Professor Riley's collection. The larva occurred on the oak Sei)tember I'-t. 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 shape, covering it with sand on the outside, 

 so that it closely resembles that of XyUnodes Ufinicolor. ('. unicornis spins a silken cocoon, with 

 debris collected and adhering to the exterior. It is evident that G. cinereofrons Pack, is only a 

 variety of bitjnttata, there being a series of connecting forms in Riley's collection now in the 

 United States National jMuseum. The moth occurred at Cambridge, Mass., June 10, and in July 

 and August. (Harris.) 



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

 different kinds of oak and on maple. The moths issued in Ai)ril and August. The coloration of 

 the larvae is quite variable, though the most uniform marking is as follows: Color, green, speckled 

 with purple. A faint substigmatal sulphur-yellow line, most distinct on thoracic Joints. A broad 

 pale subdorsal line, between which the dorsum is pale lilaceous, but thickly mottled witli rich 

 purple-brown and ferruginous, leaving a narrow dorsal line distinctly niark(>d. Two elevated 



