254 BANKS. 



probable that Culex fatigans is a caiiier of filaria and a transmitter of 

 dengue/^ and therefore tlie question of its destruction carried on in a 

 systematic and cooperative manner assumes greater importance. 



The attitude of this mosquito when at rest is so characteristic and 

 so different from that of any other species, that I have drawn a female, 

 shown on Plate IX, fig. 2. The jjosition of the head and proboscis, the 

 hind legs and abdomen are esijecially to be noted. Both males and 

 females assume this attitude. When a dark garment or a hat is moved 

 or a clothes closet is opened during the day, many individuals will at 

 once fly forth, taking to another dark recess where they may hide. 



I have successfully proved in my own dwelling in Manila that there 

 is no need to be molested by this insect, although. I live almost entirely 

 surrounded by waterways and only a few meters removed from a salt- 

 water swamp. I seldom see a mosquito in this place, either during the 

 day or night. I personally empty all receptacles where Stegomyia per- 

 sistans, 8. samarensis and Culex fatigans might breed, and so the only 

 individuals that enter, and they get in only at rare intervals, are those 

 that come from my neighbors' houses, the nearest of which is 10 or 13 

 meters away. 



Banksinella loteolateealis Theob. _, 



Culex luteolateralis Theob., Mono. Culic. (1901), 2, 71. 



, Giles, Handb. of Gnats (1902), 448. 



, Giles, Journ. Trap. Med. (1904), 7, 368. 



, Qen. Ins., Culic. (1905), 27, 987, 998. 



Banksinella luteolateralis Theob., Mono. Culic. (1907), 4, 469. 



This mosquito has been found by me in but one locality in the Phil- 

 ippines, namely, in nearly dry, grassy ditches behind the laboratory 

 building of the Bureau of Science in Manila. 



Insects were collected in July, in the late afternoon, between 5 and 6 

 o'clock. Individuals of this species settle very readily upon the hand 

 and are not very easily frightened away. Several specimens, caught by 

 placing vials over the mosquitoes as thej'' alighted, bit very readily. 



Their larvse have not yet been fovmd, but some females placed in 

 captivity laid a few eggs separately upon the surface of the water, 

 always near the edge of the vessel in which they were confined. How- 

 ever, these eggs did not hatch, so nothing is known of their life history. 



Egg: The egg measures 0.63 millimeter in length, is very dark brown and 

 irregularly oval in outline, one end being slightly more acute than the other. 

 The surface is covered witli circular, flat air-cells which are very minute at the 

 extremities and sightly larger in the middle. The form of this egg is more like 

 that oir Htegomyiu than of Culex. 



>=Ashburn and Craig: This Journal, Sect. B. (1907), 2, 128. 



