414 MOSQUITOES OF NORTH AMERICA 



three portions, outer portion slender, bearing a spatulate filament at its tip, 

 three rods, a leaf-like appendage and a seta on its outer aspect, leaf -like append- 

 age near base, seta at base, the two inner portions confluent at bases, each bearing 

 a pointed tipped spatulate filament. Clasp-filament slightly enlarged at base, 

 inflated beyond middle, where a number of long hairs arise on inner side, an 

 articulated terminal claw. Harpes with a long, slender inner branch, bent at 

 tip and bearing a row of teeth. Harpagones short, divided. Basal appendages 

 elliptical, rather long, appioximate at base, setose. 



Larva, Stage IV (plate 109, fig. 368). Head rounded, widest through eyes, 

 bulging on sides, a large notch at insertion of antennge, front margin arcuate. 

 Antenna iarge, slightly ci^i\ed, thick aod well spined on basal twc-thirds, a 

 large tuft from a notch ; tv\o long subapical setae, a long seta, a short one and a 

 digit at tip. Upper paii of dorsal head-tufts multiple, lower pair single; ante- 

 antennal tuft multiple. Mental plate triangular, with a large central tooth and 

 eight on each sidr. basal ones laig.'-r and remotely spaced, the last one smaU. 

 Mandible quadi angular; th;ee filaments and a tuft of hairs before tip; an outer 

 row of cilia from a collar; a row cf rounded transverse prominences wtU within 

 outer margin, each bearing a long hair and a tuft of short ones ; dentition of four 

 irregular teeth on a prominence with some short spines below; a spine before, a 

 long smooth filament and a row of feathered hairs within; process below ob- 

 scurely furcate, irregular on both sides, with a small transverse longitudinal 

 row of hairs and a tuft at lip cf each limb; basal angle small, a row of hairs 

 within spreading out towarcls basal row. ]\Iaxilla elongate, rather squarely 

 terminated, divided by a suture ; inner half with a row of long spines on margin, 

 some of basal ones feathered; two rows of cilia within tcw^ard base with some 

 small spines beyond; a stout articulated spine at the outer thiid ; a row of long 

 hairs at tip running down along the suture ; outei half with two filaments at the 

 basal third. Palpus rudimentary, with four long apical digits. Thorax rounded, 

 wider than long. Abdomen modciate, anteiior segments shorter ; lateral hairs in 

 threes on first segm.ent. in twos en second, in thiees on third to sixth segments; 

 skin finely spinose. Air-tube long, straight, very slightly widened at base, over 

 ten times as long as wide; pecten reaching to basal sixth, single teeth serrate 

 along one side ; four small, sparse tufts along posterior margin, the third cut of 

 line w'ith the others. Lateral comb of eighth segment of many spines in a large 

 triangular patch; single spine elongate, widened at tip, with an apical fringe 

 of spinules. Anal segment twnce as long as wide, ringed by the plate; dorsal 

 tuft of two long hairs ard a short one on each side ; ventral brush well developed, 

 confined to the barred area. Anal gills rudimentary, slender, the upper pair a 

 little longer. 



The larvae live in the water in the holes made by certain species of crabs along 

 the shore. Mr. Busck got them twice in such situations. The w ater in th: holes 

 was fresh. The habits of the adult aie unknown. 



Island of Santo Domingo, West Indies. 



Santo Domingc, south cf city, August 7, 1905 (A. Busck) ; Sauto Domingo, 

 near edge cf river, August 8, 3 905 (A. Busek). 



CULEX ELEVATOR Dyar & Knab. 



Ctilex elevator Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 207, 217, 1906. 

 Culex educator Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 207, 217, 1906. 

 Culex elevator Busck, Smiths. Misc. Colls., quart, iss., lii, 69, 1908. 



Okiqixal Desckiption of Culex elevator: 



Antennae with the tuft beyond the middle, pale at base; head hairs single; body 

 hairy; two lateral hairs on the second abdo^'nal segment, three on the third to sixth. 

 Air tube 6X1, nearly straight with very long pecten; five tufts on the posterior 

 margin; anal gills short. 



