64 American Midland Naturalist Monograph No. 3 



Missouri (70); North Carolina and South Carohna (52); Tennessee (96); 

 Virginia (49). Other States: Connecticut (94); Delaware (106); District 

 of Columbia (52); Illinois (94); Indiana (39); Maryland (19); Massa- 

 chusetts (180); New Jersey (77); New Mexico (9); New York (94); 

 Oklahoma (159); Pennsylvania (8); Texas (108). 



BIONOMICS. — The adults ocassionally enter houses but are principally 

 outdoor biters, attacking mostly at night. Adults are apparently able to mi- 

 grate several miles from their breeding grounds. They are frequently taken 

 in large numbers in light traps located on the coastal plains. It breeds prin- 

 cipally in swamps, ponds and lakes. This mosquito seems to prefer slightly 

 acid water and occurs in large numbers in the acid waters in cypress swamps 

 in Georgia and Florida. 



MEDICAL importance. — Several workers have been able to infect this 

 mosquito with Plasmodium vivax and P. jalciparum under experimental con- 

 ditions, and stomach and salivary gland infections have been found in wild 

 specimens (172, 173). However, most workers regard it as being relatively 

 unimportant as a vector of malaria when compared with A. quadrtmaculatus. 



Anopheles (Anopheles) crucians georgianus King 



Anopheles crucians var. georgianus King, 1939, Amei. Jour. Trop. Med., 19:462. 



ADULT FEMALE. — Indistinguishable from A. crucians crucians. 



ADULT MALE. — Coloration similar to that of A. crucians crucians. TER- 

 MINALIA. — Similar to that of A. crucians crucians (Fig. 30). 



LARVA (Fig. 32). — Head: Inner clypeal hairs (2) simple, arising from 

 basal tubercles, rarely separated by more than the diameter of one of the 

 tubercles; outer clypeal (3) densely, dichotomously branched, fan-shaped; 

 postclypeal (4) small, single or branched apically, nearly reaching pre- 

 clypeus; frontal hairs (5-7) large, plumose; sutural (8) 3- to 5-branched; 

 trans-sutural (9) usually 3- or 4-branched, rarely reaching base of frontal 

 hair (7). Antenna spinose; terminal hair (10) with several branches, longer 

 than the sabres; antennal tuft (11) inserted at basal third of shaft, several- 

 branched, reaching middle or slightly beyond. Thorax: Prothoracic dorsal sub- 

 median hairs (1-3) consisting of a short inner hair (1), about 3- to 6- 

 branched apically; a much larger, stout middle hair (2) with many branches; 

 and a short simple outer hair (3). Prothoracic pleural group (9-12) of four 

 hairs; hairs 9, 10 and 12 long, simple, subequal; hair 11 short, simple or 

 bifurcate. Mesothoracic pleural group (9-12) of four hairs; hairs 9 and 10 

 long, simple, subequal; hair 11 simple, minute; hair 12 about one-third as 

 long as 9 or 10, 2- or 3-branched beyond middle. Metathoracic pleural group 

 (9-12) of four hairs; hairs 9 and 10 long, simple; hair 11 simple, minute; 

 hair 12 short, with several branches beyond base. Metathoracic palmate hair 

 (1) small, with transparent leaflets. Abdomen: Submedian dorsal hair (0) 

 obsolete on segments IV and V. Palmate hair (1) well-developed and of 



