CULEX EESTRICTOR 331 



hooked tip. Clasp-filament stout, expanded toward tip, finely serrate on outer 

 margin, with an inserted terminal spine. Harpes with inner branch produced 

 into a slender stem, bearing a comb at tip, outer branch short and rudimentary. 

 Harpagones divided into a number of plates with angular apices. Basal append- 

 ages oblique, setose. 



Larva, Stage IV (plate 108, fig. 363). Head rounded, widest through eyes, 

 wider than long; antennas long and stout, a tuft at outer third, part beyond 

 slender, shaft spined ; upper head-hairs short tufts, lower long, single ; ante- 

 antennal tuft multiple. Body densely pilose; lateral abdominal hairs in threes 

 on first two segments, fours on third, in threes on fourth to sixth. Lateral comb 

 of eighth segment of rather few spines in a patch two rows deep. Air-tube seven 

 times as long as wide, gradually and slightly tapering outwardly, the pecten of 

 rather long teeth, longer outwardly, reaching beyond basal third of tube; six long 

 hair-tufts along posterior margin beyond pecten ; two small tufts on dorsal 

 aspect. Anal segment twice as long as wide, ringed by the plate, which is pilose 

 like the body ; dorsal tuft of two long and a short hair on each side ; ventral brush 

 large, confined by the chitinous ring. Anal gills small, shorter than segment, 

 tapering, tips rounded. 



The larvae live in stagnant pools along streams. Mr. Busck received them in 

 two instances, sent to him by sanitary inspectors. Larvae in life distinctly 

 striped and small. Mr. Busck labeled them in his notes " little zebra-striped 

 Culex." 



Panama. 



Bag Obispo, Canal Zone, larva from stagnant pool along Obispo Eiver, May 

 7, 1907 (G. C. Campbell) ; Las Cascadas, Canal Zone, larvae from a pool, Mav 13, 

 1907 (C.H.Bath). 



CULEX RESTRICTOR Dyar & Knab. 



Culex restrictor Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 208, 222, 1906. 

 Culex consternator Dyar & Knab, Proc. U. S. Nat. Mus., xxxv, 59, 1908. 

 Culex costernator Theobald, Mon. Culic, v, 616, 1910. 



Original Desceiption of Culex restrictor : 



Antennae with the tuft near the outer third; upper head hair triple, lower single, 

 long; lateral hairs in twos on the second to sixth abdominal segments. Air tube 

 8X1, the pecten to one-fifth; four single hairs on posterior margin. Lateral comb 

 of the eighth segment large; anal gills small. 



Collected by the junior author in a small hole in a tree in a ravine at Almoloya, 

 Oaxaca, Mexico. Our larva pupated, but failed to emerge. 



The following is an abstract of the table : 



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



5. Air tube four times as long as wide or over 7 



7. Anal appendages four, normal 8 



8. Air tube with four to ten paired tufts along the posterior line in a 



straight row, none displaced, or the hairs obsolete or absent. 18 



18. Air tube without a crown of spikes, smooth throughout 19 



19. Air tube with small double or single hairs, or bare 31 



31. Air tube uniform, without any swelling 32 



32. Air tube with single hairs or bare 37 



37. Pecten of numerous teeth densely and regularly spaced 38 



38. Lateral abdominal hairs double on segments 3 to 5 39 



39. Air tube with four rather long single hairs on posterior margin 



restrictor 

 Original Description of Cuxex consternator: 



Female. Proboscis long and slender, not distinctly swollen at the apex, entirely 

 dark-scaled, with bronzy luster; palpi nearly one- fourth the length of the proboscis, 

 slender, dark-scaled, with bronzy luster; occiput dark-scaled, the margins of the eyes 

 distinctly and rather broadly silver-white-scaled; mesonotum dark brown scaled, 



