188 



filled with mosquitos. A ship affords so many entrances and 

 breeding places that mosquito nets appear to be the only effective 

 protection. The author states that at the beginning of the out- 

 break the fever was believed to be paludal. 



Brumpt (E.) & Gonzalez-Lugo. Un Reduvide du Venezuela, le 

 Jlhodnius 'proli.vus, chez lequel evolu Trjuxinosonia cruzi. 

 [A Venezuelan Reduviid, lihodnivs ijroli.xvs, host of 

 Trypanofinina cruzi.'\ — Bvll. Soc. Fatli. Exot., Faris, lltli 

 June 1913, pp. 382-883. 



Tlio authors describe the results obtained from Rhodniv,<i 

 prnlixus, called in Venezuela " Chivo " or " Chinche de monte," 

 taken from farm labourers' houses near Valencia (Venezuela). 

 Tliree larvae artificially hatched evacuated no flagellates after 

 a non-infectious meal on 23rd March 1913, an indication that 

 infection is not hereditary. On 1st April a second meal was 

 given on a monkey {Cercoy. patas) naturally infected with T. 

 cruzi (Bahia virus). On the 19tli the evacuations contained 

 trypanosomes, with which a young rat was normally infected by 

 inoculation in the peritoneum, and on the 9th June the infected 

 evacuations still continued. On 13th May a live imago, one of 

 a batch just received, was dissected, and the evacuations of 

 several unfed nymphs were examined, but no trypanosomes were 

 found. On 10th June an adult fed upon a guinea-pig remained 

 uninfected, while two nymphs evaciiated trypanosomes and 

 Crithidia. As the guinea-pig had previously often been bitten 

 and fouled by Conorrhintis megistus, without, however, showing 

 any signs of T . cruzi, it remains to be seen whether the infection 

 was brought from Venezuela by the insects or was chronic in 

 the guinea-pig, or accidentally contracted by it. If Rhodniiis 

 remains indefinitely infective, like Conorrhinus and not for a few 

 months only, like Cimex lectularius and C. rotvndatus, it is 

 likely to prove more dangerous ; for Conorrhinus rarely evacuates 

 until after a meal, whereas Rhodnius larvae and nymphs do so 

 immediately after drawing out the rostrum, leaving excretions 

 on the skin from which the trypanosomes might make their way 

 through the dermis or be introduced by scratching on the part 

 of the patient. Rhodnius is common in parts of Venezuela, 

 Colombia and the neighbouring countries. 



Marzocchi (V.). Sur le Plitlii/ius inguinalis. — Archiv. Parnsi- 

 iologie, Paris, 10th July 1913, pp. 314-317. 



As the result of a number of experiments, the author has 

 found that Phthirius inguinalis lives apart from its natural host, 

 under favourable conditions, from 10 to 12 hours, and less if they 

 are not propitious ; that the eggs do not hatch between 18° and 

 20° C. (64° to 68° F.), and that the insects hatched between 

 30° and 32° C. (86° to 90° F.) only survive their birth for a very 

 short time, which the author was unable to determine exactly. 



