FILAEIASIS AND ELEPHANTIASIS. 



299 



shows the result of the examination of a daylight and a night specimen from 

 all patients from whom we were ahle to obtain them at both times : 



Pa- 







Pa- 







tient 



10 p.m. 



10 a.m. 



tient 



10 p.m. 



10 a.m. 



No. 







No. 







1 



21 







6 



73 







2 



121 



1 



7 



8 



1 



S 



i 







8 



9 







4 



22 







9 



3 







5 



7 







10 



23 







Method. — In taking these specimens, four rather large drops of blood 

 were placed close together on a slide. The}' were then run together with 

 a needle, forming a thick, square smear. After being allowed to "dry 

 thoroughty, the haemoglobin was dissolved by placing the slides face 

 downward in a shallow dish of water with each end resting upon a glass 

 rod. When the haemoglobin was discharged, which took but a few 

 minutes, the slides were quickly run over with a low-power objective 

 while still wet and without staining, the filarial embryo catching the eye 

 immediately as it came into the field. 



Blood counts. — Differential leucocyte counts were made upon a number 

 of the subjects of elephantiasis to determine the degree of eosinophilia 

 present. The counts showed an average of little less than five per cent, 

 the highest being 8.5 per cent and the lowest 1 per cent. The other 

 leucocytes were present in the normal proportion. The percentage of 

 eosinophiles in filarial disease is usually given higher than this, but 

 here we are dealing with many old cases from whose blood the filaria 

 had long since disappeared, and it is not to be expected that as high an 

 average of eosinophilia would be found as in more recent infections. 



V. MOSQUITOES. 



The following is the list of the mosquitoes reported from the post of 

 Camp Daraga, the identification having been made by Miss Ludlow of 

 the laboratory of the Surgeon-General, United States Army: Mansonia 

 uniformis Theob., Stegomyia fasciata persistans Banks, Uranotcenia 

 cceruleocephala lateralis Ludlow, Culex micro annulatus Theob., Culex 

 gelidus Theob., var. cuneatus, Myzorliynchus barbirostris V. d. W., and 

 Myzorhynchus vanus Walk., the latter two belonging to the Anophelinae. 

 With the exception of Culex micro annulatus none of the mosquitoes of 

 this list, so far as we know, have been identified as filaria carriers, 

 though with the limited knowledge that we have, none of these species 

 can with certainty be acquitted of the charge of spreading the disease. 



