28 TIIE CANADIAN ENTOMOLOGIST. 



2. Ceratomi'a Amyntor Hubn, (^Quadricornis Harr.) — Eggs sub-spheroid, 

 hyaline, very light yellowish green, without corrugations or striae, highly 

 luteous. Laid on the 9th of June — hatched on the 19th. Larva just hatched, 

 .18 inch, elongated, attenuate, swelling at each extremity, the thoracic diameter 

 being the greatest; colour yellowish-green ; anal horn .09 inch — acuminate 

 and black. After the first moult it assumes the appearance of the full-grown 

 larva) in everything excepting size. It moulted six times ; full-grown speci- 

 mens being seen in September. 



3. Mamestra Arctica I3oisd. — Eggs laid June 13th. Form above circular, 

 tapering towards the apex, flattened at the base j transverse diameter less 

 than longitudinal j luteous, pale yellowish-green : a cordate impression upon 

 the slightly flattened apex ; a little smaller than the eggs of Chrysophanus 

 Epixanthe. They hatched while I was not at home, and therefore I am 

 unable to give any farther account of the metamorphoses of the insect. 



4. Tetrads lorata Grote. — From two females confined in a box, I obtained 

 on June 18th-20th over three hundred eggs. These are subovate, slightly 

 flattened at the larger end, varnished. From 15 to 40 eggs are laid at a time, 

 during the night only ; they are deposited about 100 in one spot, in curving, 

 sometimes angulated rows, which have the appearance somewhat of radiating 

 from a common centre. When first laid they were yellowish-green ; on the 

 20th they had become ochra-olivaceous ; -on the 21st indian red, and by the 

 28th or 29th the greater part appeared gray, which effect was caused by 

 innumerable minute black atoms on a whitish ground. On the 81st they 

 were all a deep, though rather dull purple. Hatched on the 80th and 31st. 

 Some of the larvae lived until July 7th. Head several times larger than the 

 prothorax, ochraceous, luteous, sub-globose ; anal segment much enlarged, 

 white j proplegs, two pairs, white. The enormous head and anal segments 

 gave these caterpillars the appearance of minute, animated dumb bells. Above, 

 fuliginous; stigmatical line, white; beneath, pale red. They were very 

 active, almost constantly in motion. Each time before looping, it rears itself 

 up on its hind legs, and turns round in every direction, as if scrutinizing the 

 neighbourhood. I tried in vain to rear them, experimenting with almost 

 every food plant I could think of. 



The changes the eggs went through are most remarkable and interesting. 

 I have been unable to learn of anything at all equal to it. If any of the 

 readers of this journal know of any parallel case, or have any explanation to 

 offer as to these extraordinary alterations of the colour, I should be very glad 

 to hear from them. 



5. Mr. Scudder has in his collection the 



larval stage of an insect closely allied to this, both he and Dr. Packard 



