22 N. H. AGRI. EXPERIMENT STATION [Bulletin 243 



Genus Anopheles 



Winters as adult females. Eggs laid singly or in loose groups on the 

 surface of the water. Each egg is partly surrounded at its middle with 

 a float, an air-filled structure which prevents it from sinking to the bot- 

 tom. Several generations each year. The larvte have very short air- 

 tubes and are surface feeders, floating with the body parallel to the sur- 

 face-film. The species of this genus are carriers of malaria fever. 

 Anopheles punctipennis (Say). Mottled-wing anopheles. 



Breeds in swampy areas, ground pools of various kinds and e\'en in 

 transient rain puddles. Females bite at dusk. Not considered a dan- 

 gerous malarial carrier. Our most common Anopheles, often found in 

 houses dui'ing the winter. 



Center Harbor, July 17 (H.G.D.) ; Dublin, (A.B.) ; Monadnock, May 1 

 (A. H. Thayer); Intervale, Aug. 18 (G. M. Allen); Hampton (S. A. 

 Shaw); Durham, Feb. 11, April 10, 26, May 1, Sept. 15. 

 Anopheles macuUpennis Meigen 



Breeds in small, open, permanent pools containing alga?. A danger- 

 ous malaria carrier. Not yet collected in the state. 



Anopheles quadrimaculatus Say. Malaria mosquito 



Breeds in permanent ground pools and ponds containing alga?, also in 

 swamps, backwaters of ri\ers and sometimes in the brackish water of 

 salt-marsh pools. A very dangerous malaria carrier. 



Center Harbor, Aug. 1 (H.G.D.) ; Berlin Falls, Aug. 9 (F. G. San- 

 born). Johnson reports it from Hampton and the Mt. Monadnock dis- 

 trict. 



Anopheles walkeri Theo. 



Breeds in permanent water containing much vegetation. A rare spe- 

 cies which has not been shown to carry malaria. Not yet found in state. 



SUBFAMILY CORETHRINAE. The Non-biting Mosquitoes 

 This includes the species whose mouthparts form a short beak, not 

 fitted for biting or sucking blood. The larvae are predaceous, feeding on 

 other mosquito lar\'a^, which are seized with the modified antennce. 

 They breed in cold, shaded, woodland pools. 



Genus Corethra 



Corethra cinctipes Coq. 

 Franconia (A. T. Slosson) ; Hampton, June 13 (S. A. Shaw) 



Corethra cuUciformis (De G.) 

 Franconia (A. T. Slosson) ; Dublin (A. B.) ; Durham, May 28. 



Genus Cbaoborus 



Chaoborus albipes (Johannsen) 

 Hampton, June 27 (S. A. Shaw) 



Chaoborus crystallina (De G.) 

 Mount Washington (A. T. Slosson) 



