44 



and Arctiae is rather difficult to point out ; yet a difference exists, 

 which it is perfectly impossible not to detect. The larva of 

 Lithosias has sixteen feet, is very active, is moderately hairy, 

 does not readily roll itself in ring, but occasionally assumes that 

 attitude. The pupa is smooth, changes in a slight web, in which 

 the hairs are intermixed. The approach of Lithosia* to the 

 genus Yponomeuta, in Tinea, scarcely need be pomted out. 

 It will be observed, that Mr. Samouellef was aware of this 

 approach, and placed the genera Lithosia and Yponomeuta fol- 

 lowing each other. The splendid Callimorpha dominula, al- 

 though, to all appearance, a real Arctia, must be included in this 

 order, and placed in contact with the following one. 



Natural Order — Arctice. Larva, with sixteen feet, generally 

 very hairy, bear-like ; rolls itself in a ring when touched ; pupa 

 smooth, in a slight web. Whether the whole of Mr. Curtis's 

 genus Acronycta must be included in this order, I am not able 

 positively to say : the genus Apatela of Mr. Stephens certainly 

 must, and until I have obtained sufficient information to decide 

 on Acronycta, we must bring Mr. Stephens's genus only into the 

 order, leaving the remainder of the species undisposed of. The 

 development of the antlia in Acronycta discovers as near an 

 approach to Noctua, as Lithosia does to Tinea ; but the bear-like, 

 cocoon-spinning larva place these insects in close alliance with 

 the true Arctiae. 



Natural Order — Larice. Larva, with sixteen feet, and furnished 

 with various brushes, or fascicles of hair, on different parts of the 

 body, but mostly on the anterior dorsal segments ; it rolls itself 

 in a ring when touched. The genus Porthesia of Mr. Stephens 

 may be considered a near approach to Eriogaster, in the following 

 order, Bombyces, in many of its peculiarities, as the abdominal 

 hair vdth which it covers its eggs, in its antennas, &c. Orgyia 

 antiqua, on the other hand, is in habit, expansion of wing, 

 slender body, and apterous female, a close approach to the 

 Geometrae, near the genera Hybernia and Nyssia ; in fact, were it 

 not for the larva, that is, were the larva unknown, we should have 

 no hesitation about placing this insect with the Geometrae. 



* See note for the genera of Lithosia. \ Ent. Useful Com. p. 249. 



