108 



A Monograph of Culicidae. 



lateral angles of the head a pair of plumose hairs spring on each 

 side, the largest reaching to the distal third of the basal segment 

 of the antennae. Antennae : basal segment, upper two-thirds 

 spiny — along the inner border especially. A simple short spine 

 arises on the outer surface at the junction of the mid and lower 

 thirds. Surmounting the basal segment are two lanceolate laminae 

 and a filamentous bifurcated hair, each lamina one-third length of 

 basal segment. Maxillary palp half length of antennal basal 

 segment ; on the outer surface a short plumose hair, and on the 

 upper surface a number of small stout spines. The palp is termi- 

 nated by a wedge-shaped lamella and five spines ; two of these are 

 much shorter than the other three. Mandible : four to six simple 

 stout curved bristles forming a group at the outer angle with a 



number of smaller ones. The 

 concave borders of some of 

 the bristles are finely serrated. 

 One large notched tooth 

 followed on a lower plane by 

 a series of denticles. A row 

 of very slender simple hairs 

 arises from the median border 

 of the mandible. Lower lip 

 of Meinert : pyramidal, con- 

 sisting of seven to eight highly 

 chitinous rounded teeth. 

 Thorax : several long plumose 

 hairs, each supported by a 

 pedicel, spring from the 

 angles ; on each pedicel there is also a short curved lateral spine ; 

 sometimes only the spine is present. These spines are not 

 present on the abdominal pedicels. The anterior border is 

 ornamented by a band of white pigment ; a V-shaped conspicuous 

 mass of pigment is generally present on the upper central 

 surface ; this is absent in some specimens. Abdomen : a pair of 

 plumose hairs on the lateral borders of each of the first three 

 segments. The following segments have only simple and small 

 branched hairs. A pair of palmate hairs on each segment from 

 the second to seventh inclusive. A pair of rudimentary palmate 

 hairs on the first segment. Leaflets 12-16. Each leaflet 

 simple, narrowly lanceolate, not shouldered. Anal papillae : equal, 

 ovate, one-third length of longest posterior bristles. Semilunar 

 pigmented markings are usually found on the second and fifth 



Fig. 22. 



Cellia albimana. Wiedemann, 

 a Palmate hairs ; b antenna ; c frontal hairs. 



