Clie CanaVtHu Entomologist. 



VOL. XVII. LONDON, ONT., MARCH, 1885. No. 



J 



PREPARATORY STAGES OF ICTHYURA PALLA, French. 

 WITH NOTES ON THE SPECIES. 



BY G. H. FRENCH, CARBONDALE, ILL. 



Egg. — Globular, a little flattened at base, smooth ; color orange yel- 

 low. Duration of this period, 24 days. 



Young Larva. — Length .08 of an inch. Color pale brownish green. 

 Head and a small cervical shield jet black. Each segment has about six- 

 blackish tubercles from which arise rather long gray hairs, the dorsal 

 tubercles on segments 5 and 1 2 a little more prominent than the others. 

 Duration of this period, 3 days. 



After First Moult. — Length .14 of an inch. Color pale yellowish 

 green. Head black, as also a plate and a small spot on the top of the 

 second segment. To each segment six purplish black slightly tubercular 

 spots; those on the dorsum faint except those on 5 and 12, which are 

 prominent, each pair confluent ; a few hairs from each spot. Thoracic 

 feet black. Duration of this period, 4 days. 



After Second Moult. — Length .25 of an inch. Color green, with a 

 yellowish tint ; head and thoracic feet jet black, the spot on the middle of 

 the second segment and the plate black, but slightly purple tinted ; the 

 rest of the markings dark reddish purple. These consist of a dorsal line, 

 with a very faint line each side ; a more prominent subdorsal line, with a 

 line each side composed of elongate spots, the breaks being at the ends 

 of the segments, each spot a little broader in the middle than at the ends. 

 The upper of these bordering hne of spots contains the posterior dorsal 

 piliferous spots, the anterior of each joint being in the line bordering the 

 dorsal line. The line below the subdorsal contains the row of supra- 

 stigmatal piliferous spots. There is a faint stigmatal line with some mot- 

 tlings below. Segments 5 and 1 2 slightly elevated, the anterior pair of 

 spots closer together and colored ; a spot on each abdominal leg. Dur- 

 ation of this period, 4 days. 



After Third Moult. — Length .40 of an inch. The stripes remain the 

 same as during the preceding period. The ground color of the dorsum 



