CITLEX TARSALIS 233 



Legs slender, moderate; femora black, tips white and a fine white line on 

 either side ; tibise black, narrowly lined with white on each side and extreme base 

 and tip narrowly white ; tarsi black, each joint with a white band at base and tip, 

 first tarsal joint very narrowly white-lined within; the front tarsi with the first 

 to third joints only narrowly ringed; mid tarsi with first to fourth narrowly 

 ringed, last joint black. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 4.5 mm. 



Male. Proboscis longer and slenderer than in female. Palpi exceeding pro 

 boscis by more than length of last joint, last joint pointed, penultimate one 

 slightly enlarged, vestiture black, long joint pale ringed before the middle, the 

 others white at base, outer half of long joint and the last two joints with long 

 dense hairs. Antennte plumose ; last two joints long and slender, rugose, pilose, 

 black, the others short, pale, each with a narrow black ring at insertion of hair- 

 whorl; hairs long, fine, black. Coloration similar to the female. Wings nar- 

 rower than in the female, vestiture sparse. Abdomen elongate, narrow basally, 

 depressed and broadened on apical half ; basal pale bands broader ; lateral cilia- 

 tion long, fine and abundant, pale brown. Claw formula, 1.1-1.1-0.0. 



Length : Body about 4.5 mm. ; wing 4 mm. 



Genitalia (plate 17, fig. 125) : Side-pieces two and one-half times as long as 

 wide, tip conically tapered; marginal filaments subapical at end of a narrow 

 ridge consisting of three rods with bent tips, a leaf-like appendage, and a seta. 

 Clasp-filament moderate, curved, slightly enlarged at base, with an articulated 

 terminal spine. Harpes furcate, inner branch long, curved, outer conical, bear- 

 ing a dense tuft of spines. Harpagones furcate, one branch simple, with rounded 

 tips, the other divided into four blunt coarse teeth. Basal appendages repre- 

 sented by a row of small sharp spines. 



Larva, Stage IV (plate 104, fig. 347). Head subquadrate, rounded, wider 

 than long, front margin arcuate ; eyes slightly bulging, blunt pointed. Antennre 

 elevated on a triangular insertion, long, curved, terminal third narrow, a notch 

 bearing a very large tuft of feathered hairs, below which the thick basal part is 

 densely spined and pale colored ; three long spines and a short one at tip. Both 

 pairs of dorsal and ante-antennal tufts multiple. Mental plate elongate tri- 

 angular, with a prominent central tooth and seven on each side, the fifth large 

 and prominent, the last small. Mandible quadrangular, with slight spines near 

 base ; two long filaments, two slender ones, and a tuft of hairs from a notch before 

 tip ; an outer row of cilia from a collar; a row of hair-tufts arising from rounded 

 prominences just within outer margin ; dentition of four teeth on a process, the 

 first longest ; a long, curved tooth and two short ones at base, a very long serrate 

 filament and row of feathered hairs within ; process below long, oblique, furcate, 

 with hair-tufts at tip of each limb and in two rows on the process; basal angle 

 small, with a row of stout hairs within; basal hairs divided into two groups. 

 Maxilla elongate, conical, divided by a suture; inner half with a patch of stout 

 hairs on margin ; a row of long hairs at tip running along the suture, mixed with 

 some shorter feathered ones ; outer half with two filaments at the suture below 

 the middle and a patch of hairs near them ; a spine on other side. Palpus very 

 small, slender, with small terminal digits, one of which is longer than the others. 

 Thorax rounded, somewhat square, wider than long ; hairs abundant, very long. 

 Abdomen moderate, anterior segments shorter ; hairs moderate, the lateral tufts 

 triple beyond second segment. Tracheal tubes narrow, linear, flexuous. Air- 

 tube slender, long, a little over four times as long as wide, uniformly and very 

 slightly tapered, without any apical expansion; pecten small, reaching about 

 one-third of length of tube, folloAved by five tufts along the posterior line, the 

 last smallest; pecten tooth a moderate spine with wide base, from which arise 



