52 Tin: Wi>i Ami:ki< 



a new species, which he would name as above. What appeared 

 to be the same larvae were found at that time, June, 1891, on 

 vSalix longifolia also. On Nov. 13, 1892, I found in the Ala- 

 meda, north of Las Cruces, an egg-mass of Hemileuca eneircli- 

 a twig of the above Salix. The next day I found two mere of 

 the egg-masses on the Salix in the same locality, and, what v. 

 more, I saw on, or flying about the Salix, several moths of 

 Hemileuca, one of which I captured. This was sent to Dr. 

 Packard, who wrote that it was "with little doubt H. maia." I 

 had expected it would prove to be H. artemis, and I was there- 

 fore somewhat disappointed. Several more moths, apparently 

 the same but not captured, were seen during the latter part of 

 November flying about cotton woods south of Mesilla Park. 



It had occurred to me that possibly the larvie which feed 

 here on Salix are H. maia, while those on Populus are H. art- 

 emis. This conclusion is shaken by the fact that I have taken 

 the larvae of H. maia on mesquite, and they are much darker 

 (reddish, brownish or grayish) than those taken on Populus and 

 vSalix in June, 1891, and lack the yellowish or greenish shades of 

 the latter. From the general darker color of the maia larva, I 

 believe I can distinguish the two species as they occur here. 

 According to this separation, I find that H. artemis feeds here 

 on Populus and Salix, while H. maia feeds on Populus, Salix 

 and mesquite (Prosopis juliflora). The following notes apply to 

 the lighter greenish and yellowish larvae, which are those of H. 

 artemis : 



June 15, 1891. A good number on Salix longifolia in the 

 Alameda. Fully grown or nearly so. Migrating. 



June 24, 1891. Several specimens on Populus fremontei in 

 Alameda. Nearly and quite fully grown. 



June 30, 1891. Three more on Populus in Alameda. Nearly 

 grown. None on Salix where they were found June 15. 



May 22, 1892. A number found on a large tree of Salix 

 (not S. longifolia), about 3 miles south of Mesilla. Yellowish in 

 color, and about half grown. 



May 31, 1892. Numerous on Populus fremontei just north 

 of Las Cruces. Nearly two-thirds grown. 



June 13 to 15, 1S92. Many larvae, from two-thirds to nearly 

 fully grown, were found on Populus fremontei in the Rio Grande 



