544 MOSQUITOES OF NORTH AMEEICA 



(fed with larvae of Aedes cdlopics and Culex) and in pools and muddy hoof- 

 traeks at the head of a mangrove-lined inlet. It is obviously a temporary puddle 

 species with the general habits of the genus. 



Mexico and Central America. 



Almoloya, State of Oaxaea, Mexico, July 19, 1905 (F. Knab) ; Acapulco, 

 Mexico, July 38, 1905 (F. Knab) ; Tehuantepec, Mexico, July 3, 1905 (F. 

 Knab) ; Salina Cruz, Mexico, July 11, 1905 (F. Knab) ; Manzanillo, Mexico, 

 (A. Duges) ; Monterey, Mexico (J. Goldberger) ; Island of Maria Madre, Mex- 

 ico (A. Duges) ; Punterenas, Costa Eica, September 8, 1905 (F. Knab). 



Psorophora virescens is closely allied to P. liowardii, and was so determined 

 by Mr. Coquillett. It is however, distinct. The characters, though small, are 

 constant in both adults and larva. 



PSOROPHORA HOWARDII Coquillett. 



Psorophora howardii Coquillett, Can. Ent., xxxiii, 258, 1901. 



Psorophora howardii Dupree & Morgan, Science, n. s., xvi, 1037, 1902. 



Psorophora howardii Morgan & Dupree, U. S. Dept. Agr., Div. Ent., Bull. 40, n. s., 91, 



1903. 

 Psorophora howardii Taylor, Revista de Med. Trop., iv, 148, 157, 166, 172, 1903. 

 Psorophora howardii Theobald, Men. Culic, ill, 131, 1903. 

 Psorophora howardii Johannsen, Bull. 68, N. Y. State Mus., 410, 1903. 

 Psorophora howardii Pazos, Bull. Sec. Ent. Fr., 1904, 134, 1904. 

 Psorophora howardi Blanchard, Les Moust., 242, 1905. 



Psorophora howardii Dyar & Knab (in part), Journ. N. Y. Ent. Sec, xiv, 180, 1906. 

 Psorophora howardii Coquillett (in part), U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 



14, 1906. 

 Psorophora howardii Dyar, U. S. Dept. Agr., Bur. Ent., Circular 72, 1, 1906. 

 Psorophora howardii Theobald, Mon. Culic, Iv, 162, 1907. 

 Psorophora howardii Pazos, San. y Benef., ii, 46, 187, 1909. 

 Psorophora howardii Thibault, Proc. Ent. Sec. Wash., xii, 21, 1910. 

 Psorophora scintillans Theobald (in part, not Walker), Mon. Culic, v, 124, 1910. 

 Psorophora howardii Theobald, Mon. Culic, v, 124, 1910. 

 Psorophora cilipes Theobald (not Fabricius), Mon. Culic, v, 124, 125, 1910. 



Geiginai. Desceiption op Psobophoea howaedii : 



Male. — Head black, upper half of occiput covered with appressed white scales, 

 except a narrow median stripe, hairs black; first joint of antennae yellow, second joint 

 black, its extreme base yellow, the two terminal joints black, remainder of antennae 

 alternate black and whitish, the plumosity black changing to whitish at the tips; 

 mouth-parts black, base of third joint of palpi yellow, palpi covered with violet- 

 purple appressed scales, the last joint narrower than the preceding, tapering to the 

 apex, its hairs sparse and very short, the penultimate joint and apical fifth of the 

 preceding bearing many rather long hairs; body black, the humeri yellow, pleura 

 and sides of mesonotum bearing many appressed white scales, abdomen on upper 

 side covered with appressed violet-purple scales, those on the first segment and a few 

 at the hind angles of some of the other segments white ; wings hyaline, first basal cell 

 much longer than the second, petiole of first submarginal cell subequal in length to 

 the cell ; femora yellow, the apices black and on the under side fringed with rather 

 long, narrow, nearly erect scales, remainder of femora thinly covered with appressed 

 violaceous scales; front and middle tibiae yellow, their apices brown, thinly covered 

 with appressed violaceous scales, hind tibiae brown, the extreme bases yellow, 

 covered with appressed violet-purple scales interspersed with many suberect brown 

 ones; tarsi brown, the first joint, except its apex, and the base of the second yellow; 

 claws of front and middle tarsi very unequal in size, the anterior claw of each pair 

 bearing two teeth, the other with a single tooth, claws of hind tarsi of an equal size, 

 each one-toothed; halteres yellow, becoming brown at the apex. 



Female. — Differs from the male as follows: Antennae dark brown, the first joint 

 and base of the second yellow, the hairs dark brown, palpi dark brown, the basal 

 third yellow, bearing a few rather long hairs; hind tibiae yellow, the apices brown, 

 tarsal claws equal, each one-toothed. 



Length, excluding the proboscis, 6 mm. Three males and one female, received 

 from Dr. W. C. Coker, of the Johns Hopkins University. Type No. 5793, U. S. 

 National Museum. 



Habitat. — Hartsville, South Carolina. 



