WYEOMYIA SIMMSI 147 



One specimen, Porto Bello, San Felipe, Panama, bred from a larva in water in the 

 leaves of bromeliaceous plants. (A. H. Jennings.) 



Type. Cat. No. 11976, U. S. N. M. 



Named, at the suggestion of Mr. A. H. Jennings, in honor of Mr. H. Simms, a most 

 eflficient sanitary inspector at Empire, in the Canal Zone, Panama. 



Description of Female, Male, and Larva of Wyeomyia simmsi: 



Female. Proboscis long and slender, hardly swollen at tip, labellse small, 

 rounded, with fine outstanding sets ; vestiture bluish black, bronzy beneath. 

 Palpi short, one eighth as long as proboscis, bronzy black. Antennse moderate, 

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

 with a cup-shaped apical excavation, dark brown, with a silvery-white prui- 

 nosity ; hairs of whorls long, rather sparse, black. Clypeus broad, truncate in 

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

 bluish black. Occiput clothed with flat brown scales with dull bronzy and blue 

 reflection, a small white spot at the vertex and a large white spot at the lower 

 part of sides, part of margin of eyes white ; two setae at the vertex. 



Prothoracic lobes large, elliptical, not closely approximated dorsally, clothed 

 with flat dark bronzy violaceous scales; a row of black bristles on front margin. 

 Mesonotum clothed with elliptical, flat dark-brown scales with a bronzy and 

 blue reflection ; scales below lateral angles whitish ; seta over roots of wings 

 coarse, short, dark brown. Scutellum weakly trilobate, with vestiture similar 

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

 bristles. Postnotum elliptical, prominent, blackish, a group of small sette near 

 posterior margin. Pleurae brown, coxae luteous, clothed with elliptical, flat 

 silvery-white scales. 



Abdomen subcylindrical, compressed, truncate apically, and with long, dark- 

 brown terminal setse; dorsal vestiture black, with a slight bronzy reflection; 

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

 suberect along the medioventral line. 



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

 its cell, that of second posterior cell as long as its cell ; basal cross-vein distant 

 less than its own length from anterior cross-vein; scales of veins spatulate, 

 rather narrow, those on apical portion of second to fourth veins broader and 

 denser, brown, with a slight bronzy reflection. Halteres whitish with black 

 knobs. 



Legs moderately slender, black, with a bronzy reflection, femora silvery 

 whitish beneath ; tarsi with bronzy luster below ; hind tarsi with third joint with 

 a white spot at base below, basal two-thirds of fourth and fifth joints white be- 

 neath. Claw formula, 0.0-0.0-0.0. 



Length : Body about 3 mm. ; wing 3 mm. 



Male. Similar to the female. Antennae with the joints hardly shorter than 

 in the female, with small subapical whorls; hairs of basal whorls longer and 

 more numerous. Abdomen expanded apically, with numerous coarse black 

 bristles. Hind tarsi marked as in the female. Claw formula, 0.0-0.0-0.0. 



Length : Body about 3 mm. ; wing 2.5 mm. 



Genitalia (plate 5, fig. 28) : Side-pieces over twice as long as wide, the tips 

 conically tapered ; three long setae in a row towards base. Clasp-filament with a 

 long, slender stem, the tip expanded and trilobed ; middle lobe very large, broad, 

 membranous, the tip truncate and shallowly emarginate, clothed with rows of 

 setffi ; lateral lobes both small, mere appendages upon the middle lobe, each with 

 a sharp point at apex. Basal lobes of side-pieces rounded triangular, setose. 

 Harpes, harpagones, and unci with incurved tips, forming a series of three basal 

 cones. Basal appendages represented by two stout sets on each side. 



Larva, Stage IV (plate 92, fig. 297) . Head rounded, lateral angles moderate, 



