470 MOSQUITOES OF NORTH AMERICA 



ones situated below middle of side-piece articulated in a line. Clasp-filament 

 moderate, curved, slightly enlarged at base, with a small articulated terminal 

 appendage. Harpes single, stoutly columnar bearing a tuft of divergent spines 

 at tip. Harpagones broad, tapering to the pointed tip, with a series of small 

 teeth on inner margins. TTnci contiguous, with simple and revolute margins, 

 forming a large basal cone. No basal appendages. 



Larva, Stage IV (plate 113, fig. 385). — Head quadrate, slightly wider than 

 long, broadest posteriorly. Antennae small, cylindrical, slightly tapered, 

 smooth ; a long double hair at middle ; three long setae, a short seta and a digit at 

 tip. Eyes large, pointed. Mouth-brushes of chitinons lamellae inserted on 

 anterior lobes of head, folded downward and backward. Mental plate semi- 

 circular, excavate behind, with a central tooth and seven on each side, all about 

 alike and equally spaced, except the last which is small. Mandible much 

 reduced, elongate quadrangular, the dentition occupying most of the terminal 

 area ; a very small filament before tip, outer row of cilia short, coarse, appressed 

 to dentition; dentition large, of five teeth, the first, third and fifth longer; an 

 area of confluent spines below; basal angle obsolete; a small process with a tuft 

 of hairs; a row of fine hairs within. Maxilla quadrangular and divided by a 

 band-shaped suture, inner half somewhat produced ; inner half with a long row 

 of cUia, a tuft of stout spines at tip ; outer half witii a tuft of spines adjoining 

 apical tuft and a single long spine; two small filaments near center; a row of 

 short teeth next the palpus. Palpus short, stout; five minute digits at tip. 

 Skin of body distinctly spicular. Thorax rounded, about as long as wide ; hairs 

 moderate, short. Abdomen stout, segments transverse; lateral hairs of first two 

 segments multiple, double on third and fourth, single and very fine on fifth. 

 Air-tube stout, conically tapered outwardly, about four times as long as wide, 

 the surface finely spicular; pecten reaching well beyond middle of tube, of stout, 

 well-separated spines; single spine a simple spine with excavate base; a partly 

 double row of hair-tufts, from base almost to apex of tube ; a black band around 

 base of tube. Lateral comb of eighth segment of many scales in a large patch ; 

 single scale elliptical, often broader without, fringed with spinules; apical 

 spines longest. Anal segment much longer than wide, ringed by the plate, 

 which is obliquely excised below ; dorsal hairs two on each side ; a single lateral 

 hair; ventral brush well developed, the barred area reaching halfway to base. 

 Anal gills very small, slender, in a small group distally on segment. 



The larvae are predaceous upon the larvae of other mosquitoes, principally of 

 the genera Culex and A'edes. They occur in puddles and other collections of 

 water of not too transient a nature. Mr. Knab found the larvae in large street 

 puddles of rain water at Cordoba, Mexico, where they were preying upon the 

 larvae of Gulex coronator. Also in water in depressions on large bowlders in the 

 stream-bed of the Rio San Antonio, where they were feeding upon Gulex pinaro- 

 campa. They also occurred in pools in the stream-bed, among rocks, where they 

 preyed upon the larvas of Oulex and of A'edes euplocamus and Aedes cuneatus. 

 The adults appear to be diurnal ; Knab captured a male flying in the woods on a 

 bright day. 



Tropical Mexico to Guatemala. 



Cordoba, Mexico, June 13, 1905; January 16 and April 8, 1908 (F. Knab) ; 

 Penuela, State of Vera Cruz, Mexico, April 22, 1908 (F. Knab) ; Guatemala 

 City, Guatemala, 4800 feet, September, 1902 (G. Eisen) ; Trece Aguas, Alta 

 Vera Paz, Guatemala, March 29, 1906 (0. F. Cook). 



We have included in our references for Lutzia higoti the literature dealing 

 with Brazilian specimens, although we believe that these will prove to represent 

 one or more distinct species. We have before us a male and female collected by 



