116 MOSQUITOES OF NORTH AMERICA 



Abdomen subeylindrical, compressed, truncate apically and with many long, 

 dark-brown terminal setse ; dorsal vestiture black, with a slight metallic reflec- 

 tion; venter yellowish white, colors separated at the sides in a straight line; 

 scales along mid-ventral line somewhat raised. 



Wings moderate, hyaline; petiole of second marginal cell over one-third as 

 long as its cell, that of second posterior ceU as long as its cell ; basal cross-vein 

 dose to anterior cross- vein; scales of veins narrowly ovate, black, with bronzy 

 reflection on costa, denser on forks of second and fourth veins and outer half of 

 third, many subtruneate. Halteres whitish with black knobs. 



liCgs rather long and slender, black with bronzy and blue reflection, femora 

 whitish beneath ; tibiae and tarsi with a strong bronzy Inster beneath. Claw 

 formula, 0.0-0.0-0.0. 



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



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



Panama. 



Tabemilla, Canal Zone, May 22, 1907, a single specimen bred from a pupa in 

 a bamboo-joint, associated with CarroUia iridescens. 



WYEOMYIA AUTOCRATICA Dyar & Knab. 

 Wyeomyia autocratica Dyar & Knab, Journ. N. T. Ent. Soc, xiv, 227, 230, 1906. 



Obioinal Dbsceiption of Wyeomyia autocratica: 



This species Is allied to W. longirostris Theob., but differs markedly in the 

 structure of the tube and comb. The tube bears a false pecten as In W. ulocoma 

 Theob. but otherwise these larvae are not much alike. The specimen was received 

 from Mr. Urich in Trinidad, bred from Bromelia water with the preceding. Mr. 

 Coguillett did not find the adult different from the foregoing species. 



The following is an abstract of the table : 



1. Anal processes equally developed 3 



3. Lateral comb of the eighth segment of many teeth in a long line 4 



4. Comb of teeth in a band, at least in part two rows deep 7 



7. Tube with short spines resembling pecten 8 



8. Pecten of the air tube without preceding hair autocratica 



Descbiption of Male and Laeva of Wyeomyia autoceatica (Femalf, Unknown) : 



Male. — Proboscis moderate, swollen apically, vestiture black with bronzy and 

 bluish reflection, a paler brassy luster beneath, labellae small, rounded, with fine 

 outstanding setae. Palpi slender, flattened, one-sixth as long as proboscis, 

 bronzy black. Antennae moderate, the joints slender, subequal, rugose, coarsely 

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

 with a slight pruinosity ; a small secondary whorl towards apices of joints, basal 

 whorls of rather long and abundant hairs. Clypeus rounded, convex, dark 

 brown, pruinose. Eyes separated at vertex by a narrow wedge, bluish black. 

 Occiput clothed with flat brown scales with a metallic reflection, a margin of 

 white scales behind the eyes, widening to a patch on the lower part of the sides 

 and joining a longitudinal stripe on the vertex which runs to the nape ; two long 

 setae on the vertex and a row of shorter ones along margin of eyes. 



Prothoracic lobes elliptical, well separated, clothed with flat scales, blackish 

 brown, with submetallic reflection ; a row of setae along anterior margin. Meso- 

 notum clothed with elliptical, flat dark-brown scales, with a bronzy and blue 

 reflection, scales on anterior margin and below lateral angles whitish ; bristies 

 over roots of wings dark brown. Scutellum trilobate, with vestiture similar to 

 and continuous with that of mesonotum, each lobe with a tuft of black bristles. 

 Postnotum elliptical, prominent, dark brown, a group of small setae near pos- 

 terior margin. Pleurae brown, coxae luteous, clothed with elliptical, flat silverv- 

 white scales. 



