WYEOMYIA GYN^COPUS 107 



Mr. Jennings found the larvae in wild pineapple plants along the edge of a 

 swampy pasture ; " no bush within a quarter of a mile." 



Panama. 



Ancon, Canal Zone, December 34, 1908 (A. H. Jennings) ; Tabernilla, Canal 

 Zone, February 4, 1909 (A. H. Jennings). 



This species is closely allied to Wyeomyia abldbes, but differs slightly both as 

 adult and larva. We are not certain whether the host plant is really the culti- 

 vated pineapple or some other terrestrial bromeliad. 



WYEOMYIA GYNiECOPUS Dyar & Knab. 



Wyeomyia gynweopus Dyar & Knab, Proc. U. S. Nat. Mus., xxxv, 66, 1908. 

 Wyeomyia gynaecopus Theobald, Mon. Cullc, v, 625, 1910. 



Obiginal Description of Wyeomyia gyn^copus : 



Female. — Proboscis moderately long, slender, much dilated toward the apex, black- 

 scaled; palpi black-scaled, with bronzy luster, the tips silvery white; occiput dark- 

 scaled, with green and blue iridescence, the margin of the eyes narrowly silvery- 

 white scaled; prothoracic lobes dark-scaled, with bluish iridescence, the apices 

 rowly silvery tipped, the basal portion mostly white-scaled; mesonotum bronzy 

 brown-scaled, with obscure bluish reflection; abdomen deep bronzy brown above, 

 with blue reflection, beneath coarsely white-scaled, the colors separated on the sides 

 in a straight line; legs dark, with bronzy and bluish reflections, the hind legs with 

 the under side of the fourth and fifth tarsal joints white-marked; on the fourth joint 

 the white extends from the base nearly to the apex, the fifth white at the base. 

 Lengh, 3.5 mm. 



One specimen, Bsparta, Costa Rica, September 18, 1905. (F. Knab.) 



Type— Cat. No. 11984, U. S. N. M. 



Desceiption of Female of Wyeomyia gyn.3ecopus (Male and Laeva Unknown) : 



Female. — Proboscis moderate, tip expanded, labellae small, rounded, with fine 

 outstanding setae; vestiture bronzy black. Palpi short, flattened, one-sixth as 

 long as proboscis, bronzy black, paler bronzy at tip. Antennae moderate, the 

 joints slender, subequal, rugose, coarsely pilose, black; tori subspherical, with 

 a cup-shaped apical excavation, brown, with a whitish pruinosity; hairs of 

 whorls long, rather sparse, black. Clypeus broadly rounded, convex, dark 

 brown, silvery pruinose. Eyes separated at the vertex by a narrow wedge, 

 bluish black. Occiput clothed with flat brown scales with a blue reflection, 

 a narrow, pale margin behind the eyes, narrowest each side of vertex, joining 

 a large white spot at lower part of sides ; two long bristles at vertex and a row 

 of short ones along margin of the eyes. 



Prothoracic lobes elliptical, distinctly separated, clothed with flat blackish 

 scales, white at base and narrowly so at tip. Mesonotum clothed with ellip- 

 tical, flat dark-brown scales with a bronzy and blue reflection, scales below 

 lateral angles whitish, bristles at roots of wings brown. Scutellum trilobate, 

 with vestiture similar to and continuous with that of mesonotum, each lobe 

 with a small tuft of black bristles. Postnotum elliptical, prominent, dark brown, 

 a broad, low median carina, a group of small setae near posterior margin. Pleura; 

 dark brown, coxae luteous, clothed with elliptical, flat silvery-white scales. 



Abdomen subcylindrical, compressed, truncate apically and with many long, 

 dark-brown terminal setae ; dorsal vestiture black with a slight metallic reflec- 

 tion ; venter yellowish white, the colors separated at sides in a straight line. 



Wings moderate, hyaline; petiole of second marginal cell one-third as long 

 as its cell, that of second posterior cell shorter than its cell; basaJ cross- vein 

 distant nearly its own length from anterior cross-vein ; scales of veins ligulate, 

 denser and broadly cuneiform apically on second to fifth veins, tips of these 

 scales subtruneate or broadly rounded; black, with a slight bronzy reflection 

 on costa. Halteres whitish with black knobs. 



