936 MOSQIHTOES OF NORTH AMERICA 



Cordoba, Mexico, March 21, 1908 (P. Kaab) ; Omealca, State of Vera Cruz, 

 Mexico, April 16, 1908 (F. Knab) ; Frontera, State of Tabasco, Mexico, June 3 

 (C. H. T. Townsend) ; Bluefields, Nicaragua (W. F. Thornton) ; Orosi, Costa 

 Eica, 1200 meters, December to February (C. Picado) ; Tabemilla, Canal Zone, 

 Panama, July 10, 1907 (A. Busek) ; Tabemilla, Canal Zone, Panama, February 

 4, 1909, larva from pineapple-like plant in bush (A. H. Jenniugs) ; Frijoles, 

 Canal Zone, Panama, April 19, 1908 (A. H. Jennings) ; near Georgetown, 

 British Guiana (H. W. B. Moore) ; Hyde Park, British Guiana (H. W. B. 

 Moore) ; Siparuni Creek, Essequibo Eiver, British Guiana (K. S. Wise) ; Arima, 

 Trinidad, January 12, 1906 (F. W. Frich) ; Sangre Grande, Trinidad (F. W. 

 Urich); Cuba (Eiehl). 



We have examined two males and one femaJe from Cuba, now in the collec- 

 tion of the Museum of Comparative Zoology, Cambridge, Massachusetts, which 

 were the specimens referred to by Osten Sacken under the name hmmorrhoidalis, 

 and find iiem to be superhus. These two species are closely allied, but hcemor- 

 rhoidalis is a larger species and has the anal red tuftings involving one more 

 segment than in superbvs. The females of hcemorrhoidalis also have the hind 

 tarsi as well as the mid ones marked with white, while in superhus only the mid 

 ones are so marked. We have received Megarhinus hmmorrhoidalis from British 

 Guiana, but as yet no specimens from our territory, although it will very likely 

 be found in some part of it, especially Trinidad. 



The white markings on the mid tarsi of superhus vary in distinctness, being 

 usually obscure and bluish, but in some specimens from the Canal Zone they 

 are of a rather distinct white, visible without the aid of a lens. The red tuftings 

 on the abdomen are more easily lost in the female than in the male, so that most 

 cap^tured female specimens are largely or wholly without them, which may 

 easily lead to an error in diagnosis. 



MEGARHINUS VIOLACEUS (Wiedemann) Giles. 



Oulex violaceus Wiedemann, Dipt. Ezot, 7, 1821. 



Oulex violaceus Roblneau-Desvoidy, M4m. Sec. Hist. Nat. Paris, lii, 403, 1827. 



Oulex violaceus Wiedemann, Aussereurop. zweifl. Ins., i, 3, 1828. 



Megarhina (?) violacea Giles, Handb. Gnats or Mosq., 132, 1900. 



Megarhina (?) violacea Giles, Handb. Gnats or Mosq., 2 ed., 278, 1902. 



Megarhinus marUe Bourroul, Mosq. do BraslI, 3, 1904. 



Megarhinus violaceus Blanchard, Les Moustiques, 229, 1905. 



Megarhinus marite Blanchard, Les Moustiques, 625, 1905. 



Megarhinus marim Theobald, Men. Culic, iv, 129, 1907. 



Megarhinus marim Peryassli, Culic. do Brazil, 42, 138, 1908. 



Megarhinus mariw Theobald, Men. Culic, v, 92, 1910. 



Megarhinus iris Knab, Ins. Insc. Menstr., i, 35, 1913. 



Obioinai Desceiption of Culex violaceits: 



Chalybeus thorace fusco, abdominis lateribus auratis, tarsis absque albedine. 

 Longit. lin. 3%. c?. Bahia in Brasilia. 



A praecedente [Oulex splendens] differt magnitudine, thorace fusco magis quam 

 griseo et tarsis unlcoloribus. 



OBiorKAi. Descbiftion of Megabhinitb MASim: 



Comprimento (sem a tromba) 10 a 11 mm., tromba 7 mm., azas 5 mm. 



Trom'ba. Delgada, preta; em baixo, na metade basal, com muitas escamas bril- 

 hantes douradas, azues e vermelhas. 



Palpos. Menos de % da tromba, com 3 articulos compridos, sendo o prlmeiro 

 pouco mais da metade do segundo, que 6 egual ao terceiro. Est3.o cobertos de es- 

 camas brllhantes: em cima, azues, e roxas; em balxo, douradas com o apex dos 

 segmentos vlolaceo. 



Olypeus. Com fundo escuro e brilho branco, como tambem os toros das antennas. 



Antennas. Menores que os palpos, tendo apenas a metade da tromba; o flagello e 

 OS verticillos, escuros, quasi negros; e com muitos pellos flnos e anneis articulares, 

 esbranquiQados; o segundo segmento com escamas na metade basal. 



Occiput. Com muitas escamas escuras, mas irisadas em verde, azul celeste, roxo, 

 branco e dourado e alguns pellos escuros com brilho de ouro. 



