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anteriorly. Numerous other simple or tiny plumose setje are found upon the 

 remaining segments. 



The eighth abdominal segment is two-thirds the length of the four preceding 

 (PI. VIII, fig. 5.) The respiratory siphon, which is twice the length of the eighth 

 segment, is completely chitinous and is usually held at an angle of nearly 90° 

 to the longitudinal axis of the body. Upon its ventral surface it has four groups 

 of 5- or C-parted pectinate bristles, situated about midway from base to apex, 

 and another group composed of four short bristles half-way from the last of 

 these to the apex; dorsally a single bristle two-thirds distant from the base. 

 The pecten is composed of eight to eleven scales according to the individual 

 specimen. These scales are quite similar in shape to those of Culex restuans 

 Theob., delineated by Felt," except that one tooth is much longer than any of 

 the others. 



The lateral comb of the eighth segment is composed of about forty-two scales 

 similar in form to those of G. lazarensis Felt." 



At the base of the siphon, on the eighth segment, is a single stout bristle, 

 ventrad to which is a group of eight pectinate setae. At the posterior ventro- 

 lateral margin of the eighth segment, near the point of union of the nintli, is 

 another group of six pectinate sette. 



The ninth segment bears a chitinous annular sclerite, the posterior margin of 

 which is undulate and the posterior dorsal area of which is finely setose. 



The ventral anchor bristles are in twelve groups, each of which is composed 

 of two compound setae. The dorsal anchor bristles are six, two of which are two 

 and one-half times the length of the respiratory siphon. 



The anal tracheal gills are of the same length as the ninth segment, taper to 

 an acute apex and have a few irregularlj' placed annular spots. 



The length of the larval period in Culex fatigans is from six to eight days. 



These larvte breed almost exclusively in rain barrels and in water 

 tanks in houses. Another favorite place is in the large cans used for 

 drinking water or for rain water caught from gutters. The larvse find 

 sufficient food in the decaying particles of nipa which wash down from 

 thatched roofs or from the sides of rain barrels. They hang nearly 

 vertically in the water, but they frequently feed at the surface, in which 

 case the siphon is used as a pivot and the animal's head moves around 

 in a circle, the body being also curved to form a half circle. 



Pupa: Length over dorsum 5.5 millimeters, color light brown changing to dark 

 brown a day before the adult emerges. The respiratory siphons are of normal 

 shape and minutely setose externally. (PI. VIII, fig. 6.) 



The second abdominal segment bears a pair of fiat, plumose sette while those 

 of the first segment, although plumose, have but few (six to seven) branches. 



The third, fourth and fifth segments bear tiny compound seta; dorsally, those 

 of the third and fourth being near the posterior margin, those of the fifth being 

 disoal and submedian. In addition, each segment is provided with long, simple 

 bristles on the posterior lateral margins. On each side of the posterior margin 

 of the eighth segment are three tiny setie : simple, bi- and trifld respectively, ex- 

 tending externally from the median line. 



"N. Y. State Mus. Bull. (1904) 79, 327, fig. 71. 

 "Idem (1904) 79, 310, fig. 48. 



