92 THE CANADIAN 1':NT()M0I.0GIST 



directly posterior to this group. Tubercle III shows two long central setae, 

 tw^o minute posterior ones and three longer anterior ones; tubercle IV has four 

 long central hairs and six or seven shorter ones arranged in a crescent around 

 the edge; three short hairs are present on a level with the abdominal spiracle. 

 On the abdominal segments tubercle I bears one long, shiny, smooth, central 

 seta, three anterior shorter ones and one posterior one, very minute; tubercle 

 II is represented by a central, long hair, two shorter posterior ones, pointing 

 backward, and one very short anterior hair; tubercle III bears the same number 

 of seta? as tubercle I; tubercle IV +V shows four long central hairs and about 

 seven shorter ones, arranged in a semicircle around the ventral portion of the 

 tubercle; posterior to this group two short hairs, pointing backward, probably 

 represent tubercle 1 1 lb; tubercle \T is a large one with about twelve hairs of 

 which several are long; several hairs at the base of the prolegs represent tubercle 

 VII. Length 14 mm. 



Pupa (Fig. 3). — \'ery similar to that of homodaclyliis, green with the same 

 pale ochreous markings: the white hairs from the tubercles are, however, shorter 

 and more numerous, the abdominal segments contain a short white centrodorsal 

 hair, midway between tubercles I, and the wing cases, besides the lateral fringe 

 of fine hair, bear several additional rows of still shorter hair; the sheaths of the 

 two posterior pairs of legs are also of equal length. On the first three abdominal 

 segments tubercle I is preceded by a patch of small, white secondary hair, and 

 on these same segments it bears one long central white hair, one anterior shorter 

 hair and a single very short posterior one; on the remaining abdominal segments 

 both the secondary hairs and the anterior tubercular hair are absent. Tubercle 

 II is distinctly laterad to I, is large and bears a long, central, white hair, and 

 five shorter hairs arranged around the circumference; dorsad to tubercle II 

 is a single short hair and laterad to same tubercle, situated in the downward 

 angle of the first pale lateral line, are two small white hairs, one directed forward, 

 the other backward ; below these again are two further short hairs on a line 

 with tubercle III; this tubercle is situated on the second lateral line and bears 

 one long hair pointing forward and one short hair directed backward ; anterior 

 to III on the first three abdominal segments are two short hairs. Below the 

 spiracle and slightly posterior to same is a small tubercle with three shott white 

 hairs (?IIIb) and below this on the flange IX^ + X' appears as a large crescentic 

 tubercle with about eight long white hairs. Three short hairs, well below the 

 flange, apparently represent tubercle VI. The thoracic segments show the usual 

 modifications as well as considerable secondary hair on the posterioV dorsal 

 portion of each segment. 



Pterophorus eupatorii Fern. 



Larva (full-grown).— Head pale reddish ochre. Body pale green, becoming 

 dorsally broadly sufl^used with purple-red when fully developed; a narrow 

 ochreous dorsal stripe slightly broken centrally on each segment by a triangular 

 green dot; traces of a broad pale subdorsal band crossing tubercles I and II; 

 a narrow lateral line midway between tubercles I and III, bent downward 

 posteriorly; a l)roken spiracular line. The principal setae from tubercles I-III 

 are blackish, very slightly spiculate, long and subequal. On the abdominal 

 segments tubercles I and II are in line, contiguous, each with two long black 

 setit, the former in addition bearing two shorter anterior hairs, the latter with 



