50 



because it could be purchased immediately ; six barrels of crude oil 

 were also applied with excellent results. The oil was spread by means 

 of two " double forester " pumps. The treatment was effective ; 

 a few live larvae were found subsequently, but thousands of dead ones 

 floated down. A day or two later rain carried off most of the oil. and 

 later one small brood of mosquitos developed. Unless some remedial 

 action is taken, the condition probably will exist in West River each 

 season of scant rainfall, so long as the pollution is allowed to continue. 

 The bed should be cleared of rubbish and straightened. Similar out- 

 breaks occurred near Urbana. 111., where a creek is practically stagnant 

 in late summer, and at Greenwich, Conn. A considerable amount of 

 draining and filling has been done in the town of Greenwich, and the 

 ditches in the salt marshes have been kept clear in New Haven, Shippan 

 Point, Darien, South Norwalk and Fairfield. 



HiNDLE (E.), & CuNLiFFE (N.). Regeneration in Argas persims. — 

 Parasitology, Cambridge, vi, no. 4, Jan. 1914, pp. 353-371, 4 figs. 

 The present paper is an account of the regeneration of limbs and 

 mouth-parts in Argas persicus ; the investigations undertaken were 

 to ascertain whether immature ticks whose mouth-parts have been 

 mutilated or torn off by forcible removal of the parasite from the host 

 possess the power of regeneration ; and further to ascertain whether 

 the small legs occasionally observed in nymphal and adult ticks are 

 due to mechanical injury followed by regeneration. It was found 

 that in all stages, if the limb be amputated sufficiently long before 

 moulting, regeneration takes place, but that the regenerated appendage 

 is practically always less than normal in size, although possessing the 

 usual number of joints. In no case was there any evidence of atavistic 

 regeneration, and when the legs of a larva were amputated it always 

 regenerated nymphal legs. On comparing the periods elapsing between 

 feeding and amputation, and amputation and moulting respectively, 

 it was found that in each stage there is a minimum post-amputation 

 period, beyond which no regeneration takes place ; this period is 

 relatively longer in the case of the larva than in other stages. The 

 amputation of one or two joiiits causes a reduction in all the remaining 

 joints ; in experiments with first stage nymphs one, two, three, four and 

 five joints respectively were amputated, and in all the regenerated 

 limb was normally proportioned though reduced in size. 



CuNLiFFE (N.). Rhipicephaliis sanguineus: variation in size and 



structure due to nutrition. — Parasitology, Cambridge, vi, no. 4, Jan. 



1914, pp. 372-378, 4 figs. 



These investigations into the effect of malnutrition on Rhipicephalus 



sanguineus form a continuation to those made by Prof. Nuttall on 



R. appendicidatus [see this Review, Ser. B, i. p. 155]. The results of 



the present investigations corresponded entirelv with those obtained 



by Prof. Nuttall. 



CuNLiFFE (N.). Observations on Argas brumpti. Neumann. Parasito- 

 logy, Cambridge, vi, no. 4, Jan. 1914, pp. 379-381, 1 fig. 



Very little is known regarding the biology of Argas brumpti ; Dr. 

 Brumpt found it in rocky situations where its host was probably the 



