936 MOSQTJITOES OF NORTH AMERICA 



Cordoba, Mexico, March 31, 1908 (F. Knab) ; 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 

 Kica, 1200 meters, December to February (C. Picado) ; Tabernilla, Canal Zone, 

 Panama, July 10, 1907 (A. Busck) ; Tabernilla, Canal Zone, Panama, February 

 4, 1909,' larva from pineapple-like plant in bush (A. H. Jennings) ; 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. TJrich) ; Sangre Grande, Trinidad (F. W. 

 Urich); Cuba (Eiehl). 



We have examined two males and one female 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 hmnorrlioidalis, 

 and find them to be superhus. These two species are closely allied, but licemor- 

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

 segment than in superhus. 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 hcemorrhoidalis 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 

 captured female specimens are largely or wholly without them, which may 

 easily lead to an error in diagnosis. 



MEGARHINUS VIOLACEUS (Wiedemann) Giles. 



Culex violaceus Wiedemann, Dipt. Exot., 7, 1821. 



Culex violaceus Robineau-Desvoidy, M6m. See. Hist. Nat. Paris, iii, 403, 1827. 



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



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



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



Megarhinus mariw Bourroul, Mosq. do Brasil, 3, 1904. 



Megarhinus violaceus Blanchard, Les Moustiques, 229, 1905. 



Megarhinus mariw Blanchard, Les Moustiques, 625, 1905. 



Megarhinus mariw Theobald, Mon. Culic, iv, 129, 1907. 



Megarhinus mariw PeryassQ, Culic. do Brazil, 42, 138, 1908. 



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



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



GEiorNAL Descbiption of Culex violaceus: 



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

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



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

 griseo et tarsis unicoloribus. 



Original Descbiption of Megabhinus marle: 



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



Tromha. Delgada, preta; em baixo, na metade basal, com muitas escamas bril- 

 hantes douradas, azues e vermelhas. 



Paljtos. Menos de % da tromba, com 3 articulos compridos, sendo o primeiro 

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

 camas brilhantes: em cima, azues, e roxas; em baixo, douradas com o apex dos 

 segmentos violaceo. 



Clypeus. 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 fines e anneis articulares, 

 esbranquigados; 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. 



