136 



Judging by these experiments A. ludloivi is the most important 

 carrier of malaria with the exception of the quartan form ; the less 

 favourable results of the tests with tertian malaria may be due to the 

 fact that the tertian parasite does not develop so easily in this species 

 as the subtertian. A. hyrcanus appears to be a fairly good carrier of 

 tertian, and it is surprising that so few of these mosquitos are found 

 infected in a natural state. The negative results with A. hyrcanus 

 and subtertian malaria are very striking, as the experimental conditions 

 were abnormally favourable to infection. This result also appUes 

 to A. icmhrosus and is strange in view of the observations made in 

 Malacca, but it agrees with those of Koper in British North Borneo 

 [R.A.E., B, iii, 10]. The most remarkable fact in connection with the 

 quartan experiments was the non-infectabihty of A. Indloivi, which 

 justifies the assumption that this s])ecies is less susceptible to infection 

 with quartan than with subtertian or tertian malaria. A. hyrcanus 

 proved to be susceptible in a shght degree only. 



SwELLENGREBEL (N. H.). Aanvullingen en Verbeteringen op Swellen- 

 grebel's Anophelinen van Nederlandsch-Indie. [Complementary 

 and Emendatory Notes to Swellengrebers " Anophelines of the 

 Dutch East Indies."] — Koloniaal Instiiuut te Amsterdam [n.d,], 

 31 pp., 9 plates. [Received 5th May 1920.] 



The title of this small volume explains its contents. The original 

 monograph has aheady been noticed [R.A.E., B, vii, 19], 



SWELLENGEEBEL (N. H.) & SwELLENGREBEL DE GrAAF (J. M. H.). 



Addenda to Description of Larvae of Netherlands' Indian Anophe- 

 lines. — 3 pp., 2 plates. Issued with Meded. Biirgerlijk. Geneesk. 

 Dienst Nederl.-Indie, Weltevreden, 1919, no. 9. [Received 19th 

 May 1920.] 



The main paper has already been noticed [R.A.E., B, vii, 183]. 

 The species dealt with in these additions are : Atiophelcs {Nyssorrhyn- 

 chus) annulifes var. moluccensis, n., found in the Moluccas and 

 western New Guinea breeding in salt and fresh water, even of 

 a very dirty or putrid character ; A. (Stethomyia) aifkeni var. 

 insulae-florum, n., found in the Moluccas and the adult of which 

 is indistinguishable from that of S. aitkeni, whereas the larval 

 differences are marked ; S. aitkeni var. papuae, found in running 

 l)rooks of western New Guinea and the adult form of which is as 

 yet unknown ; and A. (Neowyzomyia) punctulatus var. orientalis, 

 from northern Celebes, the Moluccas and eastern Java, which is founded 

 •on larval characters, as the adult does not differ from the type. 



NoGucHi (H.). Leptospira ictcroides and Yellow Fever. — Proc. Nat. 

 Acad. Sci., Washington, B.C., vi, no. 3, March 1920, pp. 110-111. 



As a result of investigations at Guayaquil, Ecuador, and subsequent 

 -experiments, Leptospira icteroides has been detected in certain cases of 

 yellow fever, but cannot be regarded as the causative agent of the 

 disease until its presence has been recorded in cases from elsewhere. 



