

ENTOMOLOGICAL CONTRIBUTIONS. 133 



The imago is much more rare than the larva, and is seldom met 

 with by the collector. 



Dryocampa rubicunda (Fair.). 



Length of mature larva 1.70 inch. Head reddish-brown, with 

 the ocelli on a Innate spot. Body cylindrical, apple-green, closely 

 dotted with minute, whitish, acute granulations; a darker green, 

 narrow, dorsal stripe, and broader subdorsal, lateral and stigrnatal 

 stripes, the stigrnatal less distinct than the others. Segment one, 

 with four black tubercles on the collar, the central ones transversely 

 oval, the outer ones subtriangular ; a spine in front of the stigma 

 and another at the base of the leg. Segments two to eleven, with a 

 substigmatal row of acute, prominent, black spines pointing back- 

 ward ; a lateral row of shorter ones on the inferior margin of the 

 lateral stripe ; a subdorsal row of still shorter ones on the superior 

 margin of the subdorsal stripe, marked with whitish at base supe- 

 riorly ; a ventral row on and in range with the external basal portion 

 of the legs and prolegs, those of the prolegs (segments six to nine) 

 quite small, the other seven (segments one to five, ten and eleven) 

 nearly as long as the substigmatal ones, except those on the terminal 

 pair of legs, of which there are two on the base of each, which are 

 quite minute. All of the above spines black, the three superior ones 

 in range transversely on the anterior portion of the segment, and the 

 substigmatal ones on the middle of the segment. In addition to the 

 above, from the fourth to the twelfth segment inclusive, there is a 

 row of whitish, black-tipped short spines on the inferior margin of 

 the subdorsal stripe. Segment two has the two subdorsal spines 

 replaced by two black, blunt, spinous horns one-eighth of an inch 

 long, placed below the subdorsal stripe. The four superior spines 

 of segment eleven, more prominent than the corresponding ones of 

 the other segments. Segment twelve, with a slightly bifurcate 

 spine on the dorsal line, the size of the lateral ones of the preceding 

 segment ; anothejr in range with the stigmata, the size of the sub- 

 stigmatal ones, and having a small branch posteriorly ; a small inter- 

 mediate one ranging with the lateral line; another of the same 

 size ranging with the substigmatal line; and a ventral one similar 

 to and ranging with the ventral spines of segments ten and eleven, 

 making nine spines on this segment, nearly ranging transversely. 

 Anal shield triangular, margined externally with eight black spinules, 

 of which the six anterior ones are short, the two terminal ones green 



