136 MOSQUITOES OF NORTH AMERICA 



lowest being rather nearer together than the two uppermost chaetae; pleurae paler 

 yellowish to ochraceous, densely clothed in parts with short, broad, white scales. 



Abdomen covered with dusky-black scales, with the posterior borders of the seg- 

 ments with very minute border-bristles; venter ochraceous, clothed with pale, almost 

 creamy-yellow scales. 



Legs long, black; coxae very pale, and also the ventral surface of the femora; 

 knee spot small and pale; hind metatarsi longer than the hind tibiae; ungues equal 

 and simple. 



Wings with the veins clothed with umber-brown scales, the stem of the fourth with 

 long thin scales on one side, also the branches of the second to fifth and the base of 

 the second; first sub-marginal cell longer and a little narrower than the second 

 posterior cell, its base considerably nearer the base of the wing than the base of the 

 latter, stem about one-third the length of the cell; stem of the second posterior cell 

 rather more than two-thirds as long as the cell; posterior cross-vein about its own 

 length distant from the mid cross-vein; the marginal transverse vein joins second 

 long vein sharply and at an obtuse angle, the vein being carried a little way beyond 

 it and scaled. Halteres ochraceous, with a deep fuscous knob. 



Length. 3 to 3.5 mm.; of hind legs 8.5 mm. 



Habitat. Castries, St. Lucia (St. George Gray, 1. 2. 1900); Grenada (Broadway) 

 (63). 



Time of capture. December 25 (St. Lucia); February (Grenada). 



Observations. Some specimens were taken at an elevation of 1000 feet at 2 p. m., 

 at a place called Piton, Flore Farm, in the forest in St. Lucia. 



This species comes in my new genus, for which Professor Lankester proposed the 

 name Wyeomyia, the distinguishing character being the metathoracic bristles. 



It is a solitary species, and is very common where it occurs (in St. Lucia). Speci- 

 mens sent by Mr. Broadway from Grenada, taken on the Ballast Ground during 

 February, differ slightly from the St. Lucia specimens. The head scales are more 

 ochraceous and the posterior cross-vein is slightly nearer the mid than in the St. 

 Lucia specimens. They are not distinct, however, as far as I can see. 



This may be Williston's Aedes perturbans. But I have not yet seen specimens 

 from St. Vincent. The description, however, would apply to this as well as to one or 

 two other species. It is closely related to the species I take to be Acdes (Wyeomyia) 

 pertinans of Williston, but differs from it in the disposition of the metathoracic 

 chaetae and in the position of the cross-vein and fork-cells. 



There are no specimens of this species in the collection of the U. S. National 

 Museum. It can not be a synonym of Wyeomyia pertinans, as suggested by 

 the describer, although there is nothing in the description to contradict this 

 reference; but Dr. Howard has examined the type and reports that the mid 

 tarsi are marked with white, which is not the case with Wyeomyia pertinans. 

 The prothoracic lobes are denuded, and the type is in such poor condition that 

 we are unable to definitely place the species from present information. 



WYEOMYIA GLAUCOCEPHALA Dyar & Knab. 



Wyeomyia glaucocephala Dyar & Knab, Proc. Biol. Soc. Wash., xix, 140, 1906. 

 Wyeomyia glaucocephala Tlieobald, Mon. Culic, v, 624, 1910. 



Original Description of Wyeomyia glaucocephala: 



Prothoracic lobes entirely dark; occiput green and blue, the eyes with a white 

 margin which narrows centrally. 



7 specimens, Santo Domingo, W. I. (A. Busck). 



Type. Cat. No. 9999, U. S. Nat. Mus. 



The larva of this species was included with the larva of W. ulocoma in our de- 

 scription, cited above. They are doubtless similar; but perfect material will probably 

 enable them to be separated. 



Description of Female of Wyeomyia glaucocephala (Male and Larva Unknown) : 



Female. Proboscis moderate, slightly swollen apically, vestiture black with 

 a bronzy and blue reflection; labellte small, rounded, with fine outstanding 

 setffi. Palpi short, flattened, one-seventh as long as the proboscis, bronzy 

 black. Antennee moderate, the joints slender, subequal, rugose, coarsely pilose, 

 black; tori subspherical, with a cup-shaped apical excavation, brown with 

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

 convex, brown, slightly pruinose. Eyes separated at vertex by a narrow wedge, 

 bluish black. Occiput clothed with flat brown scales with a metallic reflection ; 



