REPORT ON MOSQUITOES. 83 



lipennis. Herbert Johnson (1902) has described a sporozoon as 

 infecting- about 8 per cent, of the females of Anopheles macn- 

 lipennis collected in a certain locality in Massachusetts in which 

 tertian malaria is endemic. Martirano (1901) has described a 

 minute trematode {Agamodistomum Martiranoi, Stiles, 1903 

 [new name] ) found in the body cavity of Anopheles claviger 

 (= A. maculipennis) taken in Italy. G. W. Mueller found an 

 undetermined sporozoon of the genus Glug-ea in Culex." 



Agamomermis ciilicis has thus far been found in the adult 

 only, but no attempt has been made to locate it in either larva or 

 pupa or anywhere outside the mosquito body. 



Several times during the summer of 1902 while examining 

 female sollicitans to determine the development of the ovaries, 

 I observed what seemed to be an abnormal enlargement of the 

 digestive tract ; but having only one purpose in view at that time 

 I neglected this until on an occasion when I tore an entire 

 abdomen apart, I found that it contained two worms and nothing 

 €lse. These were the specimens that were later sent to Dr. 

 Stiles and which served as the basis for his description. At 

 about the time this description appeared in 1903, I had under 

 examination a large series of sollicitans collected by Mr. Gross- 

 beck at Barnegat Bay, and I was surprised to find a considerable 

 number of these infested by the worms. This attracted attention 

 to the subject, and after midsummer every lot of specimens that 

 came in was examined. The result showed every collection from 

 the Raritan River to Cape May to be more or less parasitized. 

 But not a single infested specimen was found on the Newark or 

 Elizabeth marshes. 



Hundreds of specimens were collected and examined by Mr. 

 Dickerson or myself; but in not a single instance was a parasite 

 found. Furthermore, the percentage of infested specimens in- 

 creased to the south, being much the highest at Cape May. Mr. 

 Viereck's records on this point are interesting : 



Number of Number 



Date. Specimens Taken. Parasitized. 



June 25 T13 3 



July I, 148 15 



10, 151 88 



" - 27, 137 10 



31 309 112 



Sept. 13, 100 50 



" 14 TOO 39 



" 17 77 16 



" 18 62 2 



" 21, 100 8 



" 22 100 I 



" 25, 82 2 



