Genus Janthinosoma. 157 



The latter species has the last hind tarsal white. The former 

 Say expressly states has the two last joints white. 



The specimens I re-described of posticata (p. 253, Vol. I.) 

 answer exactly to Wiedemann's description, and musicus of Say 

 is seen to be totally distinct. Unfortunately Say's name, musicus 

 (1827), was used in 1825 by Leach for a Culex, and thus does 

 not stand. I have thus renamed the insect after its describer. 



Blanchard called it mexicanus, Bellardi, but Bellardi's species 

 lias the last hind tarsus white, and might be posticatus. 



Coquillett however identifies mexicanus as a distinct species, 

 and places it in a new genus, Lepidosia. 



Janthinosoma sayi. 

 Variety jamaicensis. n. v. 



A series of five $ 's taken by Lord Walsingham exactly 

 'resemble the typical sayi, but in all the specimens the last two 

 Jiind tarsals only are white, the white not spreading at all on 

 to the apex of the second tarsal segment, as seen in sayi 



Habitat. — Runaway Bay (Lord Walsingham) ; Kingston, 

 Jamaica (Dr. Grabham). 



Time of capture. — April and July. 



Note. — It is possibly a distinct species. 



Janthinosoma albipes. nov. nom. 



Janthinosoma discrucians. Theobald (non Walker). 



Mono. Culicid. III., p. 126 (1903), Theobald; Les Moustiques, p. 232 (1905), 

 Blanchard; Class. Mosq. N. and M. Amer. Tech. Se. 11, U.S. Dept. 

 Agri., p. 17 (1906), Coquillett. 



This proves to be a new species and not discrucians, Walker, 

 .a mistake having arisen owing to the type ( $ ) not agreeing with 

 Walker's description. 



Additional localities. — Fort Logan, H. Roots, Arkansas 

 (Miss Ludlow). 



Coquillett would sink this as a synonym of J. lutzii, Theobald, 

 but the latter is quite distinct, having a different ornate thorax 

 and the apex of the second hind tarsal also white. 



