ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 297 



the broods may be entirely male, entirely female, of both sexes with 

 males predominating, or of both sexes with females predominating. It 

 is difficult to explain the results of the experiments in the case of the 

 third generation where apparently the same crosses produced pure male 

 broods in two cases and a pure female brood in one case. A pure white 

 strain was easily obtained, but great difficulty was experienced in 

 obtaining pure darkly pigmented strains of the darker races. There 

 seems no doubt that the mode of inheritance is alternative. 



New Collembola.* — Justus W. Folsom deals with all the known 

 species of North American Poduridae, with the exception of the sub- 

 family Onychiurinffi. He describes and figures new species of 

 Achoi'utes, Xenylla, Fseudachondes, Odontella, Paranura and Neanura. 



y. Prototracheata. 



New Species of Peripatus.f — E- L. Bouvier describes Ooperipatus 

 paradoxus sp. n., from Queensland. The most striking features are the 

 development of a pair of papillai at the base of the foot (as in the 

 African Feripatopsis), and the presence of a genital tube in both sexes. 

 This tube resembles in the male that of Paraperipatus, and in the female 

 that of Ooperipatus. The author also discusses Peripatoides ivoodwardi 

 Bouvier and Ooperipatus oviparus Dendy. 



5. Arachnida. 



British Pseudoscorpions.| — H. Wallis Kew gives an interesting 

 historical account of the books and papers, from Hooke's " Micro- 

 graphia" (1G65) onwards, which have made additions to the list of 

 British pseudoscorpions. Forty references are given, and the number of 

 species is twenty-four. 



Traces of Tracheae in Sarcoptids.§ — E. Trouessart describes a 

 stigmatic orifice in Hyperalges magnificus, a plumicolous Sarcoptid. The 

 position of the stigma and its peritrema is on a flexible area of the 

 cuticle which separates the base of the first limb from the rostrum and 

 the epistoma. He has found a similar stigmatic peritrema in Anal- 

 gesidffi, Proctophyllodefe, Pterolichidas. These vestiges of a tracheal 

 system show that the division of Acarines into Tracheata and Atracheata 

 is not very satisfactory. 



<• Crustacea. 



Crustaceans from High Altitudes.il— Charles Chilton reports on 

 two Isopods and two Amphipods from Barrington Tops (4000 feet), 



* Proc. U.S. Nat. MuBeum, 1. (1916) pp. 477-525 (19 pis.). 

 t Arkiv f. Zool. x. (1916) pp. 1-22 (1 pi.), 

 i Journ. Quekett Micr. Club, xiii. (1916) pp. 117-36 (2 figs.). 

 § Bull. Soc. Zool. Prance, xli. (1917) pp. 61-4 (2 figs.). 

 !| Proc. Roy. Soc. N.S. Wales, 1916, pp. 82-97 (22 figs.). 



June Wth, 19 py X 



