Sept., 1904.] Dyar : The Larva of Culex functor. 171 



(Plate IX, Fig. 6), infuscated throughout, the last three pecten teeth stouter and 

 more remotely placed than the basal ones, the single hair tuft arising before the mid- 

 dle of the tube; pecten teeth (Plate IX, Fig. 7) are stout spines with two short basal 

 branches. A double row of small hair tufts on the dorsal aspect of the tube. Lat- 

 eral comb of the eighth segment consists of seven to nine single, thorn-shaped teeth 

 with finely pectinated bases, arranged in an irregular transverse row (Plate IX, Fig. 

 8). Anal segment with a small dorsal plate and terminal tuft ; ventral brush present, 

 small, arising from a barred area, which is preceded along the ventral line of the 

 segment by small, but distinct hairs. Anal processes four, moderate, not inflated, 

 without conspicuous tracheae. 



Stage III. — As in Stage II. Air tube two and a half times as long as wide, its 

 dorsal hairs forming distinct tufts, the teeth of the pecten exceeding the tuft. Head 

 brown, infuscated ; a small tuft at the middle of the antenna;, moderate, brown. 

 Body normal. 



Stage IV. — Head brown, infuscated, the antenna; moderate, equal, brown, the 

 small tuft at the middle. Body normal, the hair tufts heavy, with large chitinous 

 plates (Plate IX, Y\g. 9), the abdominal ones slight, diminishing posteriorly. Comb 

 of the eighth segment of twelve large thorn-shaped teeth ; air tube two and a half times 

 as long as wide, abruptly tapered, the tuft before the middle, followed by large de- 

 tached teeth of the pecten, with three small tufts below and a double row of hair 

 tufts above. Anal segment not ringed ; with distinct tufts before the barred area ; 

 anal tuft and brush normal, large. Anal processes four, moderate, not conspicuously 

 tracheate. 



Pupa. — As usual in Citle.x. 



EXPLANATION OF PLATE IX. 



Fig. I. Culex punctorYJxxh^. Larva. 



" 2. Culex irichurus Dyar. Egg. 



<■<■ 3. " " " The air tube of the first stage. 



" 4. " " " A pecten tooth of the air tube. 



" 5. " " " " A spine of the lateral comb of the eighth seg- 



ment. 



" 6. " " " Air tube of the second and third stages, 



" 7. " " " A spine of the air tube. 



" 8. " " " A spine of the lateral comb of the eighth seg- 



ment, second stage. 



" 9. Culex punctor Kirby. Thoracic hair tufts, fourth stage. 



"10. " " " Lateral comb of the eighth segment. 



"II. " " " Air tube, fourth stage. 



" 12. " " " A single spine of the lateral comb. 



" 13. " " " from Brit. Col. A pecten tooth of the air tube. 



" 14. " " " from Mass. A pecten tooth of the air tube. 



