DISTRIBUTION OF FILARIA NOCTURNA. 307 



None of these cases showed symptoms which could definitely be at- 

 tributed to filaria, but as noted above, the husband of one of the infected 

 women had a lymph-scrotum and varicose groin glands. (Plate I.) 

 This man, age 27, had noticed a gradual enlargement of his scrotum for 

 nine years. His three healthy appearing children were not infected with 

 parasites. 



Periodicity was determined by the examination of specimens taken 

 every two hours for at least one case in each place. The parasite in 

 all showed a marked nocturnal periodicity except in one case at Parang, 

 in which very few filaria could be found at any time either during the 

 day or night. The morphology of the parasite in this case agreed with 

 that observed in all the others. 



We wish especially to thank Lieutenants Wiegenstein and Bugbee of 

 Parang; Lieutenant Glass and Dr. Delacroix, of Cudarangan, and Major 

 Dutcher, of Cebu, for assistance in these examinations. A great deal 

 of perseverance and diplomacy was necessary on the part of the officers 

 at Cudarangan, to induce Datto Piang to permit his Mohammedans to 

 be examined; it was necessary to collect the blood from the forearm and 

 not from the ear or finger. 



