CTJLEX INTERROGATOR 417 



two-fifths ; single tooth broad, with numerous lateral serrations ; five large tufts 

 in a straight line on posterior margia, becoming progressively shorter toward 

 apex. Lateral comb of eighth segment of many spines in a triangular patch; 

 single spine elongate, widened at tip, with an apical fringe of spinules. Anal 

 segment much longer than wide, ringed by the plate; dorsal tuft of two long 

 hairs and a short one on each side ; a small triple lateral hair; ventral brush weU 

 developed, confined to the barred area. Anal gills moderate, about as long as 

 the segment, regularly tapered. 



The larvae live in ground-pools. Mr. Knab got them in a pool in a stream- 

 bed and in a pool of clear spring-water; Mr. Busek got them in a slowly running 

 spring full of leaves and from a small stream ; Mr. Jennings got them in pools 

 in rocks along a stream. 



Central America. 



Eio Aranjuez, near Puntarenas, Costa Kica, September 12, 1905 (F. Knab) ; 

 Port Limon, Costa Eica, September 30, 1905 (P. Knab) ; Tabernilla, Canal 

 Zone, Panama, May 2 and 13, 1907 (A. Busck) ; Caldera Island, Porto Bello 

 Bay, Panama, May 29, 190S (A. H. Jennings). 



Culex elevator was originally characterized twice from the larva, under two 

 different names. This was due to an error of observation in the case of Culex 

 educator, the artist having drawn the pecten of the air-tube too short. It is in 

 reality long, as in the figure of Culex elevator, as a reexamination of the speci- 

 mens shows. 



CULEX INTERROGATOR Dyar & Knab. 

 Culex interrogator Dyar & Knab, Journ. N. T. Bnt. Soc, xlv, 205, 209, 1906. 

 GsioiNAii Descbiption or Citless intekbogatob: 



The antennae have the normal structure for Gulex, but the air tube Is short as In 

 Aedes. Its pecten is stout and runs to the apical fourth. There are three hair tufts 

 and a fourth smaller, placed laterally. The comb of the eighth segment is in a long 

 straight row, supplemented by a second shorter one. The anal segment is normal. 

 The skin is pilose; the tracheae broad. 



Collected by the junior author at Rincon Antonio, Mexico, in ditches. The adults 

 were named " Culex t salinarius Coq." by Mr. Coquillett, with which species they 

 have nothing whatever to do. 



The following is an abstract of the table : 



1. Antennae with the tuft outwardly placed, the part beyond slender. . 5 



5. Air tube three times as long as wide or less 6 



6. Body pilose; pecten of the air tube to three-fourths interrogator 



Description of Femau:, Mam;, and Lakva of Cuiex intebeoqatob: 



Female. — Proboscis rather stout, slightly enlarged at tip, labellae conically 

 tapered; vestiture bronzy black, broadly whitish beneath in the middle, labellae 

 paler; setas minute, curved, black, those on labellae more prominently outstand- 

 ing. Palpi short, black, one-fifth as long as proboscis, with a few outstanding 

 setse at base. Antennae moderate, joints subequaJ, rugose, pilose, black, second 

 joint a little longer than third ; tori subspherical, with a cup-shaped apical ex- 

 cavation, brown ; hairs of whorls moderate, sparse, black. Clypeus triangular, 

 convex, black, nude. Eyes black. Occiput brown, clothed with narrow, curved, 

 very pale brownish scales, denser laterally, and many erect, forked bronzy- 

 brown ones, the lower parts of the sides and tiie margins of the eyes white scaled. 

 Prothoracic lobes elliptical, remote dorsally, clothed with pale scales and 

 brown bristles. Mesonotum dark brown, with two longitudinal bare impressed 

 lines, clothed with golden-brown, narrow curved scales ; shining whitish around 

 the edges, about ante-scutellar space, and in two spots on the disk; bristles 

 coarse, deep brown, those at lateral margins pale. Scutellum trilobate, luteous, 

 clothed with narrow whitish scales, each lobe with a group of black bristles. 

 27 



