WYEOMYIA PANAMENA 115 



Larva, Stage IV (plate 89, fig. 284) . — Head subquadrate, rounded anteriorly, 

 posterior angles well marked, the occipital foramen reaching to these angles ; 

 antennae slender, smooth, a minute double hair beyond middle; both pairs of 

 head-hairs double, ante-antennal tufts in fours. Lateral abdominal hairs in 

 twos. Comb of eighth segment of about thirty small, closely-set teeth in a single 

 row which reaches well down toward the ventral line; a single long hair behind. 

 Air-tube fusiform, about five times as long as wide, with rather long single hairs 

 imiformly distributed; terminal hooks stout. Anal segment about as long as 

 wide; dorsal plate with rounded angles; dorsal tuft of two long hairs on each 

 side; lateral hairs single, long; sub ventral tufts multiple. Anal gills missing 

 in our specimens. 



Life history and habits unknown. 



Dominica, Lesser Antilles. 



Dominica (P. B. Campbell). 



The larvae were at first identified as Wyeomyia mitchellii ( = ochrura) . The 

 adults were at first identified as Wyeomyia grayii (a species at present unknown 

 to us), but later recognized as a distinct species. 



WYEOMYIA PANAMENA Dyar & Knab. 



Wyeomyia panamena Dyar & Knab, Journ. N. Y. Ent. Sac, xv, 210, 1907. 

 Wyeomyia panamena Busck, Smiths. Misc. Colls., quart. Iss., Ill, 74, 1908. 

 Wyeomyia panamena Theobald, Mon. CuUc, v, 625, 1910. 



Obiginal Desceiption op Wyeomyia panamena: 



Proboscis moderately stout, enlarged towards the apex; palpi short, silvery scaled 

 at the apex; clypeus prominent, brown, with fine whitish pubescence; tori yellow 

 with fine silvery pubescence; occiput entirely dark scaled with faint iridescence, 

 white on the lower part of the "side; prothoracic lobes large and prominent, well 

 separated, clothed with blackish scales, a patch of whitish ones at the apices, the 

 lower portion whitish scaled; mesonotum and scutellum clothed with brownish 

 scales and bronzy and bluish luster; metanotum pitchy black, with a group of setae 

 near the apex; abdomen compressed, black scaled above, white beneath, the colors 

 separated in a straight line on the sides; legs entirely dark with metallic luster, 

 beneath the legs are bright bronzy. Length, 4 mm. 



One specimen, Tabernilla, Canal Zone, Panama (August Busck, collector), bred 

 from a pupa in a bamboo joint. 



Type. — No. 10856, U. S. National Museum. 



Desckiption of Femau; of Wyeomyia panamena (Male and Laeva Unknown) : 



Female. — Proboscis rather short, swollen apically, vestiture black with a 

 bronzy and bluish reflection; labellae small, rounded, with fine outstanding 

 setffi. Palpi slender, flattened, one-fifth as long as proboscis, bronzy or bluish 

 black, with white tips. Antennae moderate, the joints slender, subequal, rugose, 

 pilose, black; tori subspherical, with a cup-shaped apical excavation, luteous 

 with a silvery-white pruinosity; hairs of whorls long, rather sparse, black. 

 Clypeus 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 metallic reflection, a white patch below extending a short distance up 

 margin of eyes; two long setae at the vertex and short ones along margins of eyes. 

 Prothoracic lobes elliptical, well separated, clothed with flat scales, blackish 

 brown, with a minute white tip and white base; a row of setae on anterior 

 margin. Mesonotum clothed with elliptical, flat dark-brown scales with a 

 submetallic reflection; scales on anterior margin and lateral angles whitish; 

 bristles over roots of wings dark 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, an obscure median carina, 

 dark brown, a group of small setae near posterior margin. Pleurae dark brown, 

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



