WTEOMYIA 49 



Wings moderate, hyaline, petiole of second marginal cell two-fifths as long 

 as its cell ; that of second posterior cell shorter than its cell ; basal eross-Tein 

 distant less than its own length from anterior cross-rein; scales of veins rather 

 narrow on basal portion of wing, elliptical towards tip, many obliquely sub- 

 tnineate, denser and broader on apical portions of second to fourth veins. 



Legs rather slender, black, with bronzy and blue reflection, femora and hind 

 tibias pale golden beneath, tibise and tarsi with bright bronzy luster below; last 

 hind tarsal joint silvery white beneath ; mid tarsi white beneath on last three 

 joints. Claw formula, 0.0-0.0-0-. 



Length : Body about 3.5 mm. ; wing 3.5 mm. 



Male. — Similar to the female. Proboscis much swollen toward apex. An- 

 tennae slender, more delicate than in the female, the joints scarcely shorter, the 

 hairs of the whorls longer and more abundant, the ciliation coarse, scattered. Ab- 

 domen short, cylindrical, much expanded toward apex, with numerous coarse 

 black bristles at tip. Hind legs white below to second tarsal joint, fifth joint 

 also white beneath, as in the female ; mid tarsi with the last three joints silvery 

 white all around. Wings narrower than in the female, the stems of the fork- 

 cells longer, the basal cross-vein closely approximated to the anterior one. Claw 

 formula^ 0.0-0.0-0.-. 



Length : Body about 3.5 mm. ; wing 3.8 mm. 



Genitalia (plate 3, fig. 5) : Side-pieces over twice as long as broad, some- 

 what prismatic and terminating in a sharp horn at outer angle ; a prominence at 

 base giving rise to dense, long, waved hair. Clasp-filament rather short, with a 

 pointed branch near base ; apex enlarged and divided ; inner lobe broad, with a 

 tooth on its margin and a row of setse; outer lobe with prominences and two 

 rows of setse. Harpes elliptical concave, toothed at tip ; harpagones small, bear- 

 ing a pecten. Basal appendages with a row of five spatulate appendages. 



The typical specimens were taken flying by day in a shaded cacao grove. 

 Mr. Jennings bred others from larvae in palm-spathes lying on the ground, but 

 unfortunately preserved no larval skins. 



East coast of Costa Rica to Panama. 



Port Limon, Costa Rica, adults captured, September 38, 1905 (F. Knab) ; 

 Upper Pequini River, Panama, March 30, 1909, larvae from palm-spathe, asso- 

 ciated with Joilotia digitatus (A. H. Jennings) . 



Limatus mefhysticus is not closely allied to the others in the genus, as it 

 lacks the peculiar bent proboscis of the male and the colors of the abdomen are 

 separated laterally in a straight line ; we include it, however, as the structure of 

 the claws of the hind tarsi agrees. 



Genus WYEOMYIA Theobald. 



Aedes Williston (in part, not Meigen), Trans. Ent. See. Lend., 271, 1896. 



AeOes Giles (in part), Gnats or Mosq., 343, 1900. 



Wyeomyia Theobald, Journ. Trop. Med., iv, 235, 1901. ("Without species.) 



Wyeomyia Theobald, Men. Culic, ii, 267, 1901. 



Wyeomyia Neveu-Lemaire, MSm. See. Zool. France, xv, 223, 1902. 



Wyeomyia Giles, Gnats or Mosq., 2 ed., 495, 1902. 



Wyeomyia Theobald, Mon. Culic, iii, 310, 1903. 



Phoniomyia Theobald, Mon. Culic, iii, 311, 1903. 



Dendromyia Theobald, Mon. Culic, iii, 313, 1903. 



Aedes Johannsen (in part), N. Y. State Mus. Bull. 68, 391, 392, 424, 1903. 



Phoniomyia, Wyeomyia, and Dendromyia Lutz, in Bourroul, Mosq. do Brasil, 56-57, 



1904. 

 Wyeomyia Felt, N. Y. State Mus. Bull. 79, 391e, 1904. 

 Wyeomyia Blanchard, Les Moustiques, 423, 1905. 

 Phoniomyia Blanchard, Les Moustiques, 425, 1905. 

 Dendromyia Blanchard, Les Moustiques, 426, 1905. 

 Phoniomyia and Wyeomyia Theobald, Genera Insectorum, Culic, 38, 1905. 



