452 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



parthenogenesis in the Hymenoptera appear in the Entomol- 

 ogist *s Monthly Magazine. 



M. Lich ten stein lias obtained galls of Spathogaster bacca- 

 rum from eggs laid by JSTeuroterus lenticularis. Mr. Cameron 

 now confirms similar observations by Adler, and has found 

 that the female saw-fly, JPcecilosoma pulveratum, the male of 

 which is unknown, laid eggs from which the embryo devel- 

 oped, but the larva did not hatch, owing to the withering of 

 the leaf. 



The minute Demodex folliculoriwi, zi low mite-like animal 

 found in the skin of the face of man, has been found by Mr. 

 Walter Faxon to occur in the ox, injuring materially cow- 

 hides sent to market. His account appears in the Didletui 

 of the Museum of Comparative Zoology. In the parts about 

 the neck and shoulders especially, the skins presented numer- 

 ous slight swellings which, under pressure, emitted a quantity 

 of soft, whitish matter. After being tanned and split, the 

 leather appeared disfigured with pits from one to six mil- 

 limeters in width, which in many cases penetrated nearly 

 through the thickness of the leather. In many of the sam- 

 ples eight or ten pits occurred within the area of one square 

 inch. There are three varieties of this Demodex which infest 

 man, the cat, and dog, and either these or allied varieties or 

 species occur in the skin of the fox, bat, ox, horse, and 

 sheep. 



In a synopsis of the boreal Collembola, or JPodwidm, Dr. 

 Tullberg describes all the known Greenland forms of this 

 group, of which there are five species known. Several are 

 described from Nova Zembla, Siberia, and Spitzbergen, and 

 our knowledge of the arctic species is greatly extended. 

 Orchesella cincta is recorded from Newfoundland. 



In the sixth edition of his " Guide to the Study of Insects," 

 Dr. Packard, among other changes, proposes the name Cinu- 

 ra for those Thysanura belonging to the families Depismatidw 

 and CampodeoR. The group is considered to be a sub-order, 

 equivalent to the Collembola of Lubbock, while the T/rysanu- 

 ra are regarded as constituting an order. 



In studying the anatomy of the Kocky Mountain locust, 

 described in the first annual report of the United States 

 Entomological Commission, especially the male intromittent 

 organ and accessory parts, Dr. Packard finds that the penis 



