154 MOSQTJITOES OF NORTH AMERICA' 



longer one more strongly curved, those of hind tarsi small, subequal ; formula, 

 0.0-0.0-0.0. 



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



Type : No. 13705, U. S. Nat. Mus. 



Genitalia (plate 6, fig. 38) : Side-piece short, conical, its outer angle produced 

 into an arm twice as long as basal part ; a dense tuft of long coarse hairs arising 

 from inner aspect of basal part. Clasp-filament slender, attenuated, rather 

 long, with tip triangularly expanded. Harpagones and harpes greatly reduced, 

 minute, scarcely distinguishable. Basal appendages represented by three small 

 spines on each side. Penultimate segment weakly angled on sides but not pro- 

 duced, the median ventral area densely hairy. 



One of the bred adults bears an isolation number, but we have been unable to 

 find the corresponding larval sMn in Mr. Jennings's material. 



The larvae live in the water in the flower-bracts of Calathea discolor. Mr. 

 Jennings bred our three types from this plant. 



Panama. 



Tabemilla, Canal Zone, April 14, 1909 (A. H. Jennings) ; Upper Pequini 

 Eiver, March 27, 1909 (A. H. Jennings). 



The species is closely allied to Wyeomyia circumcincta, but occurs in another 

 plant (Calathea) and is clearly distinct. According to Mr. Jennings's notes, the 

 specimens from the Pequini Eiver were obtained from bromelias, and if this 

 note is correct the species must inhabit both plants. We suspect, however, that 

 some confusion has occurred in the labeling. W. circumcincta is a common 

 species in bromelias, but W. canonus was not met with until Mr. Jennings ob- 

 tained collections from the Calathea plants, so we think that it is in all proba- 

 bility confined to this plant. 



WYEOMYIA BAKIA Dyai & Enab. 



Wyeomyia taria Dyar & Knab, Proc. XJ. S. Nat. Mus., xxxv, G9, 1908. 

 Wyeomyia iana Theobald, Men. Culic, v, 626, 1910. 



OsioiNAi. Desceiption of "Wte»mtia babia: 



Female. — Proboscis moderately long and slender, much swollen aplcally, dark- 

 scaled; palpi dark-scaled; occiput dark-scaled, with obscure bronzy luster; at the 

 sides of the eyes very narrowly white-margined; on the vertex a minute white 

 spot; prothoracic lobes dark-scaled, the apices silvery scaled, the basal portion also 

 silver-scaled; mesonotum dark brownish-scaled, with bronzy and bluish luster; 

 abdomen dark-scaled above, with brownish and bluish luster, beneath white-scaled, 

 the colors separated on the sides in a straight line; legs dark-scaled, with bronzy 

 and blue reflections; front and mid tarsi unmarked; hind tarsi with the fourth 

 joint silvery white scaled to the apex beneath; the fifth joint silvery white-marked 

 beneath on its basal two-thirds. Length, 3 mm. 



One specimen, Sonsonate, Salvador, August 30, 1905. (F. Knab.) 



Type.— Cat. No. 11992, U. S. N. M. 



Description of Femat.b of Wyeomyia babia (Mau: and Labva Unknown) : 



Female. — Proboscis moderate, the tip expanded, the labellse small, rounded, 

 with fine outstanding setae ; vestiture bronzy black, with brighter luster beneath. 

 Palpi short, flattened, one-fifth as long as proboscis, bronzy black. Antennae 

 moderate, the joints slender, subequal, rugose, coarsely pilose, black; tori sub- 

 spherical, with a cup-shaped apical excavation, dark brown, with a whitish 

 pruinosity; hairs of the whorls long, rather sparse, black. Clypeus rounded, 

 convex, dark-brown pruinose. Byes separated at the vertex by a narrow wedge, 

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

 a large white spot at lower part of sides ; two setae at the vertex and smaller ones 

 along margin of eyes. 



Prothoracic lobes elliptical, well separated, clothed with flat dark-brown 

 scales similar to those of mesonotum, lower half silvery white ; a row of setae 



