58 EXPERIMENT STATION EECOED. 



this paper has been previously noted (E. S. R., 23. p. 762) ; the second part is 

 noted above. 



The evolution of Trypanosoma evansi through the fly: Tabanus and 

 Stomoxys, F. S. H. Baldrey {Jour. Trop. Vet. Set., 6 (1911), No. 3, pp. 271-2S2, 

 pis. 2). — In the ob.servations reported many hundreds of flies were used and 

 500 slides examined, and in no case was development of the parasite further 

 advanced than in the spore or piroplasmic form observed. " This appears to 

 indicate that the development was either arrested or that the cycle is com- 

 pleted in another way, probably through the egg of the fly or by a second cycle 

 through a mammalian animal." 



Observations of the tachinid parasite of the nonne moth (Parasetigena 

 segregata), F. Timaeus (Natunv. Ztschr. Forst u. Landw., 9 {1911), No. 2, pp. 

 89-95, fig. 1 ) . — This paper, which includes a note by K. Escherich, under whose 

 direction the studies were conducted, deals with the incubation period of the 

 eggs and the entrance of the larvaj into the host. 



References are given to literature on the subject. 



The control of the olive fly and Prof. Lotrionte's experiments (Abs. in 

 Internat. Inst. Agr. [Rome'\, Bid. Bur. Agr. Intel, and Plant Diseases, 2 {1911), 

 No. 7, pp. 1S36-1S3S). — A study made by G. Lotrionte of aromas or scents most 

 attractive to the olive fly, the influence of colored light, etc. is here summarized. 



Glucose was found much more attractive than molasses. An olive grove about 

 1 kilometer from other olive groves and sprayed 4 or 5 times with a mix- 

 ture of glucose diluted with 20 per cent of water and 2 per cent of copper 

 sulphate, was scarcely infected (0.33 per cent) whereas groves which had not 

 been thus treated were iufected to an extent of from 9 to 23 per cent. All 

 olive trees treated with this mixture were in excellent condition, and free from 

 sooty mold and from attack by Cycloconium. 



Numbers and types of bacteria carried by city flies, J. C. Torrey {Jour. 

 Infect. Diseases, 10 {1912), No. 2, pp. 166-171). — "Flies examined up to the 

 latter part of Juue were free from fecal bacteria and carried a homogeneous 

 flora of coccal forms. During July and August there occuri'ed periods in which 

 the flies examined carried several millions of bacteria, alternating with periods 

 in which the number of bacteria were reduced to hundreds. The scanty flora 

 probably indicated the advent of swarms of recently hatched flies. Fecal bac- 

 teria of the colon type were first encountered in abundance the early part of 

 July. The bacteria in the intestines of the fly were 8.G times as numerous 

 as on the surface of the insects. On the surface of the flies the colon group 

 bacteria constituted 13.1 per cent of the total ; and within the intestine 37.5 per 

 cent of the total. 



" Of the lactose fermenters, isolated and identified. 79.5 per cent belonged 

 in the colon-aerogenes group and 20.5 per cent in the acidi lactici group. Fif- 

 teen cultures of streptococci, isolated and identified, were distributed among 

 the equinus, fecalis, and salivarius groups. There were none of the pyogenes 

 type. The most important isolations were 3 cultures of B. paratyphosus. 

 Type A. 



" Bacteria of the paracolon type causing a final intense alkaline reaction in 

 litmus milk and fermenting only certain monosaccharids were frequently en- 

 countered during August." 



Contribution to the knowledge of the biology of European rat fleas 

 (Ceratophyllus fasciatus), N. H. Swellengrebel {Arch. Schiffs u. Tropcn 

 Hyg., 16 {1912), No. 6, pp. 169-182, figs. //).— The author's studies are presented 

 under the following headings : Distribution of fleas in the docks and other parts 

 of Amsterdam, feeding experiments with the blood of man and the rat, 

 longevity of unfod fleas, destruction of fleas, and personal prophylaxis. 



