MOSQUITOES AND THEIR EXTERMINATION. 463 



pidse, Belostomatida?) deserve mention." lie also speaks of the 

 'water tiger,' the larva of llic hirgo water beetle (Dytiscus), and tells 

 of its ability to clear Culex larvae from pools of water. 



In this connection a brief description of a newly discovered mos- 

 quito,* to which has been given the name Eucoretlira underwoodi, 

 should be of interest, since it has been found that their larvae devour 

 the wigglers of other mosquitoes, and imlike other mosquitoes, the 

 adult female insect does not bite. As the proboscis of this insect is 

 so formed that it can not puncture the skin, it should not perhaps be 

 called a true mosquito, though it has been classed as one, since it 

 belongs to the family Culicidte. 



The larvae of this insect were found by the author on January 27. 

 1903, in the Maine woods in the eastern section of Penobscot County, 

 and were discovered in a spring of water from which a crew of lumber- 



FiG. 12. Larva Eucurelhra underwoudi. Dorsal View. 



men were getting their water supply. A few days later, other larvae 

 of the same species were found in a similar spring about eight miles 

 distant, though in this case, as the spring was not in use, its surface 

 was covered with a coating of ice an inch thick. The temperature of 

 the water at the bottom (it was about two feet deep) was 43° F. 



At first sight this larva would be taken for an Anopheles of extra- 

 ordinary size, as it is of the same general shape, and when the water was 

 cleared of ice, it lay just beneath and parallel to the surface, breathing 

 through a short respiratory siphon, as is characteristic of the larvae of 

 Anopheles. In this spring a barrel had been sunk and in the fifty 

 gallons, or thereabouts, of water which it contained there were twenty- 

 five larvae. They were all of about the same size — 13 to 14 mm. long 



* Under the title * A New Mosquito ' a description of this mosquito ap- 

 peared in Science, August 7, New Series, Vol. XVIII., No. 449. 



