WYEOMYIA AGYRTES 133 



plate reaching well down the sides ; dorsal tuft of five long hairs on each side ; 

 lateral tuft of three long hairs ; small subventral stellate tufts ; no ventral brush ; 

 a broad black band at base of plate. Anal gills two, broad, moderate, the other 

 pair vestigial. 



The larva? live in the water in bamboo-joints and similar locations. 



Trinidad, British West Indies, and Panama. 



Trinidad (F. W. Urich) ; San Juan, Trinidad, larvas in bamboo-joints (F. W. 

 Urich) ; Tabernilla, Canal Zone, Panama, May 21, 1907, larvge in bamboo- 

 joints, and May 22, 1907, larvae in bamboo-traps (A. Busck). 



Our specimens from Trinidad were originally determined as Wyeomyia 

 asuUepta Theobald, a species described from British Guiana. Dr. Howard has 

 examined the types of W. asuUepta in the British Museum and reports that the 

 prothoracic lobes are denuded, that there is no white margin visible behind the 

 eyes, nor white on the tarsi of the mid legs. The species is, therefore, undeter- 

 minable from the type, and we feel obliged to consider the form before us 

 distinct, until the contrary can be proven by fresh material. The name Wyeo- 

 myia hromeliarum is unfortunate, as this is one of the species of Wyeomyia 

 that does not live in the leaves of Bromeliaceae, but we can not change the name 

 now. We possess but a single specimen of the adult, a female, from Trinidad, 

 and two specimens, both males, from Panama. We have considered them to be 

 conspecific, as no differences are obvious in the adults, but the localities are 

 remote, and the material insufficient. Moreover, the larvae present certain 

 differences, apparently of specific value, more particularly in the shape of anal 

 plate (compare Journ. N. Y. Ent. Soc, xiv, plate xv, fig. 69,* larva from 

 Trinidad and our present figure, plate 91, fig. 293, larva from Panama) ; but 

 we feel averse to dividing the species on the present material. The name 

 Wyeomyia hromeliarum pertains to the Trinidad form ; the Panama form will 

 receive a new name if further material should indicate it. 



WYEOMYIA AGYRTES Dyar & Knab. 

 Wyeomyia agyrtes Dyar & Knab, Smiths. Misc. Colls., quart, iss., lii, 265, 1909. 

 Original Description of Wteomyia agyrtes: 



Proboscis rather short, swollen towards the apex. Occiput clothed with dark 

 scales, the eyes with a narrow white margin. Prothoracic lobes blackish, a white 

 patch below. Abdomen with the colors separated on the sides in a straight line. 

 Wing-scales broadly ovate, their tips obliquely subtruncate, dense. Legs black with 

 bronzy and blue reflections, front and mid legs bright bronzy beneath, without white 

 markings in the female. Length, 3.5 mm. 



One specimen, Tabernilla, Canal Zone, Panama, bred from larvae taken May 16, 

 1905, in water in a bamboo stump (A. Busck). 



Type no. 12184, U. S. N. M. 



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



Female. Proboscis rather short and stout, swollen apically, vestiture black 

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

 setae. Palpi short, flattened, one-sixth as long as proboscis, bronzy black. 

 Antennse moderate, the joints slender, subequal, rugose, coarsely pilose, black; 

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

 of whorls long, rather sparse, black. Clypeus rounded, convex, dark brown, 

 pruinose. Eyes separated at the vertex by a narrow wedge, bluish black. Occi- 

 put clothed with flat dark-brown scales with bronzy and blue reflections, a 

 pale spot at the vertex, a white patch below, the two joined by a white border 

 behind the eyes; two long setie at the vertex and small ones along margins of 

 eyes. 



The peculiar plate at the base of the comb is present In the Trinidad larvae as well as in 

 the Panama ones. It was omitted from the figure of the Trinidad larva, as, at the time, Mr. 

 Knab thought it to be a malformation. 



