Anophelinae. 15 



4. CELLIA ALBIPES. Theobald. 



(The Allied Swamp Mosquito.) 



(Mono. Culicid. I., p. 125, 1901, and III., p. 110, 1903.) 



General appearance. Resembles the preceding species, but 

 can always be told by the last hind tarsus having a clear black 

 basal band, which is quite constant. 



Geographical distribution. South America (in Brazil, British 

 Guiana) and in all the West Indian Islands. 



In Jamaica it is very common at the Ferry and Rockforb 

 Swamps and over the Lignanea Plain. Dr. Grabham also records 

 it from Bath, Bowden, Annotto Bay, Port Antonio, Bluefields, 

 Oastleton, and Spaldings. 



Life-history and habits. Breeding grounds very variable, such 

 as rivers, large swamps, small swamps, irrigated cane-fields, 

 ditches, trenches, canals, small water-ways and water holes and 

 depressions made by the feet of cattle. Not only in fresh water, 

 but also in salt water, for Dr. Low records it in a lagoon of water 

 .shut off from the sea by a bank of sand only ten yards wide, 

 with no vegetation except some old seaweed in fact, almost any 

 natural collection of water may contain them. So far, none have 

 been found in tubs, barrels, or any other artificial collection. The 

 figures I gave in my monograph of the larval characters (p. Ill, 

 fig. 65) are not of this species, but probably of C. argyrotarsis sent 

 with them, both larvae now and again occurring in the same 

 pool. The descriptions given here of the egg, larva and pupa 

 are drawn up by Dr. Grabham, who has followed them closely 

 in development. 



The Egg. Eggs laid in batches of fifty to eighty arranged 

 together side by side or in stellate groups on the surface of the 

 water. Length, 0*4 mm., breadth, 0*2 mm., across the widest 

 points of the floats. Upper surface dumb-bell-shaped. Fringe 

 represented by a thickened ridge without striation. Floats of 

 relatively large size, attachment to seven-eighths length of 

 fringe. On the under surface floats nearly meet. Lower surface 

 with irregular polygonal markings. 



The larva. Head with distinctive markings as in the figure 

 (Plate 3, Fig. 1). Brushes when extended reach as far as the 

 extremities of the antennae. Four simple hairs project over mouth, 

 of nearly equal length, outer pair slightly longer (Plate 2, Fig. 2, c). 

 A pair of small curved hairs on the edge of clypeus near the 

 median line. Four plumose hairs arranged across the centre of 



