146 MOSQiriTOES OF NORTH AMERICA 



length, on last joint the silver expanded to outer side. Mid tarsi with the claws 

 slightly unequal and semi-opposed, those of hind tarsi small and subequal; 

 formula, 0.0-0.0-0.0. 



Genitalia (plate 5, fig. 37) : Side-pieces over twice as long as wide, the tips 

 conieally tapered ; six setae in a nearly straight row towards base. Clasp-fila- 

 ment with a very long, slender stem, the tip divided into three separate lobes; 

 inner lobe slender, with a spine near its tip; middle lobe small, elliptical, with a 

 row of coarse, blunt teeth; outer lobe broad, rounded, with a projection below, 

 rows of setaB and long coarse hairs at apex. Harpes slender, the tips curved and 

 obscurely dentate. Harpagones and unci with their tips contiguous, forming 

 basal cylinders. Basal appendages represented by two or three stout hairs on 

 each side. 



Larva, Stage IV (plate 92, fig. 296). — ^Head rounded, the posterior angles 

 prominent; antennas rather long, slender, with a minute single hair at outer 

 fourth; head-hairs small, in threes, only the hairs above the mouth single. 

 Lateral comb of eighth segment of many spines in a large patch, three or more 

 rows deep ; a long two-haired tuft behind. Air-tube rather stout, very slightly 

 fusiform, less than four times as long as wide ; dorsal aspect with a number of 

 single hairs unevenly distributed; ventral aspect with a tuft near base, followed 

 by a long two-haired tuft ; a false pecten of five stout spines beginning near the 

 middle and running to the apical fourth, followed by slight hairs. Anal seg- 

 ment about as long as wide, with a large dorsal plate ; dorsal tuft of five hairs 

 on each side ; lateral hair long, single ; subventral tuft probably small, stellate. 

 Anal gills missing in the specimen. 



The larvae live ia the water in the fiower-bracts of a species of Heliconia 

 with upright flowers. Mr. Barber found them associated with Wyeomyia galoa. 



Gruatemala. 



Cacao, Trece Aguas, Alta Vera Paz, April 1, 15, and 17, 1906 (H. S. Barber). 



We have removed the specimens from Aguna, Guatemala, and Bocas del Toro, 

 Panama, referred to in the original description, from this species, as their con- 

 dition is such that they can not be determined with accuracy. The specimens 

 which we determined for Mr. Busck as Wyeomyia chalcocephala wiU be found 

 here referred to under Wyeomyia symmachus. We are puzzled as to the exact 

 identity of this species and fear some confusion still exists in the material. Ac- 

 cording to the collector, the specimens were bred from Heliconia and the larvae 

 are in fact of the type that occurs in that plant; but the male genitalia are those 

 of a bromelia-inhabiting species. We base our description upon the adults, and 

 refer to the larvae and life history upon the authority of the collector, but with 

 doubt and reservation. 



WYEOMYIA SIMMSI (Dyar & Knab). 



Phoniomyia simmsi Dyar & Knab, Proc. U. S. Nat. Mus., xxxv, 65, 1908. 

 Phoniomyia ( ?) simmsi Theobald, Mon. CuUc, v, 623, 1910. 

 Obiginal DEscErPTiON OF Phoniomyia simmsi: 



Female. — Proboscis long and slender, black-scaled; palpi short, slender, black- 

 scaled; occiput dark-scaled, with bronzy and blue reflections; eyes margined with 

 whitish scales, which are more conspicuous on the vertex; wedge between the eyes 

 white-scaled; prothoracic lobes dark-scaled, with blue reflection; mesonotum dark- 

 brown-scaled, with bluish reflection; metanotum with a group of setse near the apex, 

 without scales; postscutellum clothed with scales like those of the abdomen; abdo- 

 men dark-scaled above, with coppery and blue reflections; beneath silvery white- 

 scaled, the lateral margins straight; tip of abdomen blunt, bristly; wing-veins 

 clothed with brown, rather broad scales; legs dark-scaled, with blue and bronze re- 

 flections; under side of the femora and tibiae whitish-scaled; on the hind legs the 

 tarsi are light-scaled beneath, becoming clear silvery white upon the last tarsal 

 joint. Length, 3.6 mm. 



