874 MOSQUITOES OF NORTH AMERICA 



widely furcate, with a row of hairs along margin and a tuft at tip of each limb ; 

 basal angle slight ; a tow of hairs within and a row at base. Maxilla irregularly 

 hemispherical, divided by a suture ; inner half mostly covered with hairs, those 

 on margin longer and stiffer ; a row of long stout hairs at tip ; outer half with 

 two small filaments near tip, a subapical spine and a patch of fine hairs; palpus 

 moderate, slender, with five small apical digits. Skin of body smooth. Thorax 

 rounded, wider than long. Abdomen moderate, anterior segments shorter; 

 lateral hairs in threes on first two segments, in twos on third to fifth ; subdorsal 

 hairs in stellate tufts. Air-tube stout, tapered outwardly, about three times as 

 long as wide ; pecten reaching nearly to middle, of stout closely placed teeth, 

 the teeth with a single basal branch ; a single three-haired tuft beyond pecten. 

 Lateral comb of eighth segment of twelve scales in a single row ; single scale a 

 thorn-shaped spine fringed with very short fine spinules. Anal segment as 

 long as broad, with a dorsal plate reaching well down the sides, a row of long 

 spines on its posterior margin ; dorsal tuft a long hair and brush on each side ; 

 a lateral multiple tuft on posterior angle of plate ; ventral brush well developed, 

 with hairs preceding the barred area and a small triangular plate on each side ; 

 anal gills moderate, about as long as the segment, the lower pair shorter than 

 the upper. 



Mr. Knab found the larvae in water in a hole in a tree-trunk at Tehuantepec. 

 Also in a tree-hole at Salina Cruz, Mexico. Concerning the latter locality he 

 says : " The presence of blue mosquitoes led to a search for hollow trees and at 

 last one was found. A tree, perhaps a foot through, had a hole into which 

 the hand could barely be inserted. It contained liquid as dark as strong coffee 

 and in this were larvae and pupae." At Acapulco, Mexico, Mr. Knab en- 

 countered the species in a hollow in a large surface root of a tree, containing 

 more than a quart of very dark liquid with numerous larvge, apparently all of 

 one species. Again in the village of San Antonio, near Sonsonate, Salvador, 

 there was a large tree with widely spreading surface roots. Two holes in these 

 roots contained water and larvae of this species. Mr. Busck bred a specimen 

 from water in broken bamboos on Tobago Island, near Trinidad, West Indies. 

 The larvae will probably be found to occur occasionally in artificial receptacles 

 as well as in tree-holes. A female was taken by Dr. Grabham biting a horse. 

 We have no other observations on the life history. 



Tropical America. 



Acapulco, Mexico, July 30, 1905 (F. Knab) ; Salina Cruz, Mexico, July 15, 

 1905 (F. Knab) ; Tehuantepec, Mexico, July 1, 1905 (F. Knab) ; Las Penas, 

 State of Jalisco, Mexico, July 18, 1903 (A. Duges) ; Tonala, State of Chiapas, 

 Mexico (A. Duges) ; Santa Lucrecia, State of Vera Cruz, Mexico, June 19, 

 1905 (F. Knab) ; Frontera, State of Tabasco, Mexico, April 28 (C. H. T. 

 Townsend) ; Sonsonate, Salvador, August 18, 1905 (F. Knab) ; Izalco, Sal- 

 vador, August 21, 1905 (F. Knab) ; Las Loras, Costa Eica, September 8, 1905 

 (F. Knab) ; Rio Aranjuez, Costa Eica, September 12, 1905 (F. Knab) ; San 

 Jose, Costa Eica, September 21, 1905 (F. Knab) ; Lion Hill, Canal Zone, 

 Panama (A. Busck) ; Miraflores, Canal Zone, Panama, May 9, 1908 (A. 

 H. Jennings) ; Ancon, Canal Zone, Panama, February 19, 1908 (A. H. Jen- 

 nings) ; Schepmoed, British Guiana, January 29, 1906 (E. D. Eowland) ; 

 Tobago Island, near Trinidad, July, 1905 (A, Busck) ; Kingston, Jamaica, 

 July 8, 1903 (M. Grabham). 



In describing Hwmagogus equinus Theobald states positively that the claws 

 of the female are simple, and repeats the statement in the fourth volume of his 

 work. However, he mentions two specimens, one of which was in the possession 

 of Dr. Grabham. This we have examined, through the kindness of Dr. Grab- 

 ham, and find the claws to be toothed. Dr. Howard has since examined the 

 other specimen in the British Museum and found the claws to be toothed. We 



