142 MOSQUITOES OF NOKTH AMERICA 



Legs rather long and slender, black with a bronzy reflection, the femora 

 whitish beneath ; tibias and tarsi with a strong bronzy luster beneath ; mid legs 

 with strong brassy luster beneath, third and fifth tarsals with a pale-bronzy 

 luster on outer side, fourth joint silvery on outer side ; hind tarsi with bases of 

 the first three joints narrowly silvery beneath, the last two white beneath 

 except at the tips. Claw formula, 0.0-0.0-0.0. 



Length : Body about 3 mm. ; wing 2.8 mm. 



Male. — Proboscis pale bronzy beneath, becoming silvery towards base. Palpi 

 small and slender. Antennae similar to those of the female, the joints with a 

 small secondary subapical whorl, the hairs of the basal whorls longer and more 

 abundant than in the female. Coloration similar to the female. Abdomen 

 rather long and slender, compressed, considerably expanded towards tip, the 

 claspers visible between the lateral series of long bristles. Wings with the stems 

 of the fork-cells slightly longer than in the female. Front and mid legs with a 

 brilliant brassy luster beneath ; mid legs slightly shorter than front ones, outer 

 half of second and all of third and fourth tarsals silvery white on outer side ; 

 hind legs with tibiae silvery beneath to near apex, tarsi marked as in the female. 

 Mid tarsi with a single claw, those of hind tarsi subequal ; formula, 0.0—0-0.0. 



Length : Body about 3 mm. ; wing 3.5 mm. 



Genitalia (plate 5, fig. 36) : Side-pieces over twice as long as wide, the tips 

 conically tapered; three long hairs in a line towards base. Clasp-filament with 

 a long, slender stem, the tip expanded and divided into three lobes ; middle lobe 

 broad, with a truncate excavate tip, bearing rows of marginal setae and a row 

 across the middle; outer lobe long and slender; inner lobe slender, bearing a 

 sharp, erect spine. Basal lobes of side-piece rounded triangular, setose. Harpes 

 slender, elliptical, with thickened margin, the tip bent and obscurely dentate. 

 Harpagones and unci similar but smaller, forming basal cones. Basal appen- 

 dag'es represented by three stout setae on each side. 



Larva, Stage IV (plate 91, fig. 394) . — Head rounded, almost circular in out- 

 line, without lateral angles; antennas rather long, slender; upper head-hairs 

 triple, lower ones single, ante-antennal tuft triple. Lateral abdominal hairs 

 in twos after second segment, single on seventh segment. Comb of eighth seg- 

 ment of about thirty fine, closely set teeth in a long, single row, reaching nearly 

 to the ventral line ; a stellate tuft and a long two-haired tuft behind. Air-tube 

 fusiform, about five times as long as wide, with single hairs rather uniformly 

 scattered over the surface ; terminal hooks moderate. Anal segment longer than 

 wide, the dorsal plate reaching well down the sides ; dorsal tuft of two long hairs 

 on each side ; lateral hair single, arising from the angle of the plate ; sub ventral 

 tufts short, stellate. Anal gills about as long as the segment, stout, with rounded 

 tips, equal. 



The larvae live in water between the leaves of epiphytic Bromeliaceae, Mr. Jen- 

 nings found them in a bromelia on a fallen tree near a brook. 



Panama. 



Caldera Island, Porto Bello Bay, January 3, 1908, larvae from a bromeliad 

 (A. H. Jennings). 



WYEOMYIA SYMMACHUS Dyar & Knab. 



Wyeomyia chaloocephala Busck (not Dyar & Knab), Smiths. Misc. Colls., quart, iss., 



lii, 74, 1908. 

 Wyeomyia symmachus Dyar & Knab, Smiths. Misc. Colls., quart, iss., lii, 262, 1909. 

 Wyeomyia euethes Dyar & Knab, Smiths. Misc. Colls., quart. Iss., lii, 263, 1909. 



Obiqinal Descbiption of Wyeomyia symmachus: 



Femalk. — Proboscis moderately long, somewhat swollen at the tip, black-scaled. 

 Occiput dark-scaled, the eyes with a narrow white margin, interrupted towards the 

 vertex. Prothoracio lobes dark-scaled, the tips silvery white, as also the basal por- 



