558 



A Monograph of Ctdicidae. 



(Dr. Dyar) \ Mississippi State (Professor Glenn Herrick) \ Fort 

 Barrancas, Florida (Miss Ludlow). 



Observations. — Numerous recent observations have been made 

 on the larvae by Professor Smith, Dr. Dyar, and others. 



The eggs are laid in a boat-shaped mass on the surface of 

 water, more angular and less regular than in Culex, The young 

 larvae when feeding at the surface hold their body more parallel 

 to the surface than Culex, and to some extent resemble A nophelines 

 in position. They are fond of resting below the leaves of Lemna. 

 This species breeds all the summer, preferring warm stagnant 

 pools containing Spirogyra. They have been found in June, 

 August, and September in New Jersey. It is a local breeder, 

 being found in and about the same places each year and always 



Fig. 256. 



Peeten teeth of U. sapphirina. 

 (After Felt.) 



Fig. 257. 



Terminal segment of larva of W. sapphirina. 



(After Felt.) 



in permanent bodies of water. It is not known how the winter 

 is passed. 



The larva when full grown is 5 to 5 • 5 mm. long, yellowish- 

 brown or greyish in colour; head dark brown, but may be 

 marked with yellow or pale brown; antennae short, a few short 

 spines on the surface, apex with two long and two short spines 

 and a small articulating process ; labial plate triangular with nine 

 or eleven blunt teeth largest at the apex, smallest towards the 

 base ; eighth segment with large lateral plates, with a row of 

 six to nine stout spines on edge, each finely fringed with hairs ; 

 spines of siphon composed of twelve to fourteen in each row, no 

 basal teeth, but with a fringe; of long fine hairs all around them. 



The pupa resembles that of Culex, but is very small and has 

 unusually long air tubes. 



