Dec, 1906] Dyar and Knab : Larvae of Culicid.-e 183 



Janthinosoma jamaicensis Theobald. 



Culcx jamaicensis Theobald, Mon. Culie., i, 345, 1901. 

 Grabliamia jamaicensis Theobald, Mon. Culic, iii, 244, 1903. 

 Culex jamaicensis Blanchard, I,es Moustiques, 279, 1905. 

 Grabliamia jamaicensis Blanchard, Les Moustiques, 397, 1905. 



Recorded from Jamaica only. We have before us a widespread 

 species, common along the Atlantic seaboard, taken bv Mr. Busck 

 on St. Domingo and by the junior author in Santa Lucrecia, Rincon 

 Antonio, Tehuantepec, Salina Cruz and Almoloya, Mexico. It was 

 formerly named " perturbans Walk.' ' by Mr. Coquillett, then changed 

 to "confinis Arrib." ' under which name a figure of the larva was pub- 

 lished by the senior author (see Blanchard, Les Moustiques, p. 297). 

 and lastly named jamaicensis Theob. We accept this name, al- 

 though lacking the positive identification of larvae from Jamaica. 

 Janthinosoma signipennis Coquil'ett. 



Tccniorhynchus signipennis Coquillett, Proe. ent. soc. Wash., vi, 167, 1904. 

 Tceniorhynchus signipennis Dyar, Journ. N. Y. ent. soc., xii, 244, 1904. 



Described from Monterey, Mexico. Our larvae are from Laredo, 

 Texas, bred by Dr. Berry. 



Genus CERATOCYSTIA, new. 



Characterized by the greatly enlarged, bent antennae, which have 

 two of the apical spines far removed from the tip. The larva is allied 

 to Janthinosoma, except that the tube is not inflated. This is appar- 

 ently compensated for by the enlargement of the antennae. Type, 

 C. discolor Coq. 



Ceratocystia discolor Coquillett. 



Culex discolor Coquillett, Can. ent., xxxv, 256, 1903. 



Culex discolor Smith, Ent. news, xv, 147, 1904. 



Culex discolor Dyar, Journ. N. Y. ent. soc, xii, 173, 1904. 



Culex discolor Felt, Bull. 79, N. Y. Sta. Mus., 297, 1904. 



Culex discolor Smith, Agr. Exp. Sta. N. J., Rept. Mosq., 193, 1905. 



Described from New Jersey- The species occurs sparingly along 

 the Atlantic seaboard and has been taken by the junior author at 

 Tehuantepec, Mexico. The larvae occur in temporary rain puddles 

 in company with Janthinosoma and Psorophora. The eggs are spinose, 

 as in those genera. All these spinose eggs seem adapted to lie in 

 dried ground and hatch immediately after a shower. The develop- 

 ment of the larva is rapid. 



