"WYEOMTIA PANTOIA 123 



Panama. 



Miraflores, Canal Zone, February 8, 1909 (A. H. Jennings) ; Tabernilla, 

 Canal Zone, April 16, 1909 (A. H. Jennings) ; Caldera Island, Porto Bello 

 Bay, March 5, 1908 (A. H. Jennings) . 



The adults are indistinguishable from those of Wyeomyia pseudopecten and 

 Wyeomyia pantoia, but the male genitalia are easily separable from both and 

 the life habits differ. This species is apparently confined to the flowers of 

 Calathea discolor, while the other species mentioned inhabit those of Heliconia. 

 The specimen which we quote above from Caldera Island is one of the original 

 types of Wyeomyia pantoia, but as it is a female, it is undeterminable from the 

 genitalia, and we quote it here on account of its host plant, which was Calathea 

 and not Heliconia. In the larva, the number of false pecten-teeth on the air- 

 tube, as in the preceding and following species {pseudopecten, pantoia and 

 onidus), varies between two and four. 



WYEOMYIA PANTOIA Dyar & Knab. 



Wyeomyia pantoia Dyar & Knab, Smiths. Misc. Colls., quart. Iss., Ill, 262, 1909. 

 Okiginal Descbiption of Wtbomtia pantoia: 



Female. — Proboscis moderately long, swollen towards the tip, black-scaled. Occi- 

 put entirely dark-scaled. Prothoracic lobes dark-scaled, without light scales at the 

 apices. Abdomen dark-scaled above, white beneath, the colors separated on the 

 sides in a straight line. Legs bronzy brown, the femora pale beneath, the hind tarsi 

 with the last two joints silvery white beneath; fore and mid tarsi without white. 

 Wing-scales broad. 



Mau:. — Coloration as in the female. 



Six specimens, bred from larvae in flower-cups of Heliconia and captured, Taber- 

 nilla, Canal Zone, Panama, Caldera Island, Porto Bello Bay, Panama (A. H. 

 Jennings) . 



Type no. 12055, U. S. N. M. 

 Desceiption or Female, Male, and Laeva of Wyeomyia pantoia: 



Female. — Proboscis rather short, expanded at the tip, the labellse coni- 

 cally tapered, with fine outstanding setae; vestiture bronzy black, with pale- 

 bronzy luster beneath. Palpi small, one-sixth as long as proboscis, clothed 

 with bronzy-black scales. Clypeus rounded, convex, dark brown, pruinose. 

 Antennae moderate, the joints subequal, rugose, coarsely pilose, black; tori 

 subspherical with a cup-shaped apical excavation, dark brown, pruinose ; hairs 

 of whorls sparse, moderate, black. Eyes separated by a narrow wedge, bluish 

 black. Occiput clothed with flat appressed scales, black with blue and green 

 reflection, a white patch at the sides below and a narrow margin of white 

 scales along eyes, sometimes obscure or concealed, a median longitudinal pale 

 shade, iridescent and ill-defined ; two setae at the vertex and smaller ones at the 

 sides along the eye-margin. 



Prothoracic lobes large, distinctly separated, blackish, clothed with dark- 

 brown scales with a slight submetallic reflection; a white patch below; a row of 

 setae on anterior margin. Mesonotum clothed with elliptical, flat dark-brown 

 scales with bronzy and blue reflections ; bristles over roots of wings dark brown ; 

 scales below lateral angles silvery gray. Scutellum trilobate, vestiture similar to 

 and continuous with that of mesonotum, each lobe with a small tuft of black 

 bristles. Postnotum elliptical, prominent, a well-defined median carina, dark 

 brown, a group of small setae posteriorly. Pleurae brown, coxae luteous, clothed 

 with elliptical silvery-white scales. 



Abdomen subcylindrical, with many coarse, dark-brown terminal setae ; dorsal 

 vestiture black with a slight metalUc reflection ; venter yellowish silvery white, 

 the colors separated on the sides in a straight line. 



Wings rather narrow, hyaline; petiole of second marginal cell one-fourth as 

 long as its cell, that of second posterior cell nearly as long as its cell; basal 

 cross-vein distant about its own length from anterior cross-vein ; scales of veins 



