Dec, 1906] DyarandKnab: L/Arvje of Cuucid^. 181 



Mexico, and it has been sent us from Las Caseadas in the Panama 

 Canal zone by Dr. J. A. Le Prince. 



Genus JANTHINOSOMA Arribalzaga. 



Janthinosoma Arribalzaga, Rev. del Mus. de La Plata, ii, 152, 1891. 

 Conchyliastes Coquillett in Howard, Mosquitoes, 234, 1901. 

 Feltidia Dyar, Proe. ent. soe. Wash., vii, 47, 1905. 

 Ianthinosoma Blanehard, Les Moustiques, 231, 1905. 



Table of species. 



1. Antennae long and prominent, longer than the head 2 



Antennae moderate or short, shorter than the head 5 



2. Anal segment long and slender, longer than wide 3 



Anal segment short, shorter than wide 4 



3. Comb of the eighth segment of six or seven subequal spines sayi 



Comb of five spines, the upper and lower ones small varipes 



4. Pecten teeth of the ar tube with four long sharp spines infnic 



Pecten teeth of the air tube with two reduced rounded branches, .scholasticus 



5. Tube fusiform-inflated; teeth of comb joined by a chilinous band 6 



Tube barrel-shaped; teeth of comb separate pygmeea 



6. Antennae black on outer half; four spines of tube pecten scattered to the 



basal half of the tube jamaicensis 



Antenna? all white; the four spines of the tube pecten restricted to the 

 basal third of the tube signipennis 



Janthinosoma sayi, new name. 



Culex musicus Say (not Leach), Proc. acad. nat. sci. Phil., vi, 149, 1827. 

 Ianthinosoma mexicana Blanehard, Les Moustiques, 234, 1905. 



The larva is found in temporary rain puddles and develops rapid- 

 ly, as do all of this genus. It occurs along the Atlantic seaboard as 

 far North as Massachusetts, but is common only further South. The 

 senior author met with it in abundance at Tampa, Florida. The 

 junior author collected it at Santa Lucrecia, Almoloya and Tehuan- 

 tepec, Mexico; Sonsonate, Salvador; Corinto, Nicaragua; Puntarenas 

 and Port Limon, Costa Rica. Blanehard says that musictts Say 

 (preoccupied) is surely the same as mexicanus Bellardi ; but Coquillett 

 has identified as mexicana another species, which he refers to "Cu- 

 lex" as it differs in scale structure. We therefore propose the new 

 name sayi for our familiar species. 



Janthinosoma varipes Coquillett. 



Conchyliastes varipes Coquillett, Can. ent., xxxvi., 10, 1904. 

 Janthinosoma varipes Blanehard, Les Moustiques, 626, 190.5, 



