108 THE CANADIAN ENTOMOLOGIST. 



PREPARATORY STAGES OF CATOCALA PAL^EOGAMA, Guen. 



BY G. H. FRENCH, CARBONDALE, ILL. 



Egg. — Diameter .04 inch, low conoidal, a prominent bulging ridge 

 round the base of one half of a hundredth of an inch on each side, so 

 that inside of this the egg is .03 inch ; striated with 38 prominent long- 

 itudinal striae, of which 1 2 reach the small micropyle, shallow transverse 

 striae ; apex small, not depressed. Color dull, pale, brownish olive. 

 Duration of this period not known, bul at least 194 days. 



Young Larva. — Length .12 inch, of the usual Catocala shape, loopers 

 on account of the first and second pairs of pro-legs being small ; pale 

 brownish yellow, joints 5 and 6 dark, somewhat blackish, joints 7 and 8 

 whitish, 9 and 10 blackish again; a faint fine red line on each side of 

 body, very short hairs from the pelifirous spots. Duration of this period 

 three days. 



After 1 st Moult.— Length .20 inch. Color reniform pale whitish, 

 slightly brown tinted, head darker, a red line on each side with a broken 

 line above it and another below it, of the same color, on the ventre a 

 round red spot on the middle of each joint. Duration of this period 

 four days. 



After 2nd Moult. — Length .28 inch. On the sides are four rather 

 broad, dark reddish purple stripes, alternating with pale greenish ones, 

 these dark stripes approaching on joint 2 so that there is here only 

 a narrow dorsal light line, the upper line indistinct ; from joint 2 the 

 dorsum widens out in pale greenish so that in the middle of the body this 

 color extends to the region of the subdorsum, its outer part containing 

 the upper part of the lateral stripe which is here broken and of a purplish 

 areen color. The dorsum from joint 5 to 10 has in its centre a series of 

 very narrow elliptical pale purplish green spots extending from the middle 

 of each joint to the middle of the next one back. Pilifirous spots small 

 and black, head mottled with irregular longitudinal purplish black and 

 pale greenish markings, the purple on joint 2 being of the same color 

 but a little paler on its back part. Ventre with spots of the same dark 

 color in the centres of the joints ; feet pale. Toward the close of this 

 period the larvae turn darker, many of them being as dark on the whole 

 of the dorsum as on the thoracic segments at the beginning of the period, 

 this color purplish black, with a fine whitish dorsal line ; all of them 



