154 A Monograph of Culicidae. 



sink, as the name was used two years previously by Leach 

 (1825). I propose to call Say's musicus — sayi, after the 

 describer. 



Janthinosoma posticata. Wiedemann (non Coquillett) (1821). 

 Culex posticatus. Wiedemann (1821). 

 Janthinosoma terminalis. Coquillett (1906). 



Mem. de la Soc. d'Hist. Nat. de Paris, p. 410 (1827), Robineau Desvoidy ; 

 Bull. no. 4 (N. S.) U.S. Dep. Agri. Div. Ent., p. 22 (1896), Howard; 

 Handbk. Gnats, p. 278(1900), Giles; Dipt. Exot. I., 43, 2 (1821), 

 Wiedemann; Auss. Zweif. Ins., p. 9 (1828) ; Mono. Culicid. I., p. 253 

 (1901), and III., p. 125 (1903), Theobald; Les Moust., p. 233 (1905), 

 Blanchard. 



Coquillett makes Wiedemann's species to have the last two 

 hind tarsals white. Wiedmann only says, " apices of the posterior 

 tarsi clear white." The species which he refers to as posticata, 

 with a wholly yellow-scaled thorax, is thus new, and I propose 

 to call it coguillettii, his terminalis sinking as a synonym. 



Janthinosoma varipes. Coquillett (1903). 

 Conchyliastes varipes. Coquillett (1903). 

 Janthinosoma johnstonii. Grabham (1905). 



Canad. Entomo., p. 10 (1903) ; Class. Mosq. N. and M. America Tech. Se. 11, 

 U.S. Dept. Agri., p. 17 (1906), Coquillett. 



This insect is so near Janthinosoma sayi that it may easily 

 be confused, but the last segment of the hind tarsus is brown, 

 not white. 



Coquillett's original description is as follows : — 



" Black, front and hind femora except their broad apices, the posterior 

 side of the middle femora except their apices, and the stems of the halteres, 

 yellow, the fourth segment of hind tarsi white ; scales of palpi violaceous, 

 those of the occiput yellowish white and with a patch of violaceous ones 

 on either side (mesonotum abraded; what scales remain are yellowish 

 white and a few black ones along the middle) ; scales of abdomen violet 

 blue, those on sides of first two segments, hind angles of the others except 

 the last one, under surface of each segment except the last one and base 

 of the preceding, whitish ; scales on yellow portion of femora yellowish- 

 white, those on the remainder and on tibiae violet blue, those on the tarsals 

 black except on the fourth segment of hind tarsi, where they are white, 

 claws of front tarsals toothed ; wings greyish hyaline, veins and scales 



