80 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



sion from marginal ridge. Basistemum large, about 176 \i wide and 130 y. long, i.e. 1-68-1-96 

 (average 1 -79) times longer than membranous area of scutum ; median ridge reduced to a few 

 vestiges of which the combined length is less than half the length of the basistemum ; marginal 

 and precoxal ridges well developed ; without setae. Furca well developed. Mesothoracic 

 spiracle with well developed peritreme ; postmesospiracular setae absent. Tegula small, 

 membranous bulge with a small weak sclerite posteriorly and with 1-5 (average 2-8) h.s. Third 

 axillary wing sclerite with small, rounded ventral projection at its base. Additional sclerite 

 well sclerotized. Antemetaspiracular setae absent. 



Metathorax. Metanotum with posterior margin thickened throughout ; suspensorial sclerites 

 absent. Postnotum consisting of a large, subtriangular sclerite on each side. Metatergal setae : 

 usually one h.s. on each side. Pleural ridge considerably reduced, extending only a short 

 distance above coxal articulation. Episternum reduced to a small subtriangular plate, epi- 

 meron produced posteriorly. Metathoracic spiracle similar to mesothoracic one. Dorsospiracular 

 setae absent. Postmetaspiracular setae : 5—13 (average 9-1) f.s. and 0-2 (average 0-4) h.s. 

 Metasternal plate transverse, irregular ; weak irregular sclerotization present in the area 

 anterior to the sternum. Anterior metasternal setae : 14-23 (average 18) f.s. and 0-3 (average 

 o-6) h.s. ; posterior metasternal setae : 8-15 (average 11) f.s. 



Wings hyaline ; long (1 255-1 340, average 1303 \x) and narrow (width 395-430, average 413 (i.), 

 ratio width to length being 1 : 3-02-3-29 (average 3-16) ; alar lobe and alar setae absent. 

 H alter es absent. 



Legs short and moderately slender, with fore legs usually longest and middle pair shortest ; 

 ratio length of hind leg to body length is 1 : 1-96-2-09 (average 2-04). Length of segments 

 (in (x) : 



Leg 

 I 



II 



III 



Coxae with 6-9 (average 7-6), 10-13 (average 12) and 13-18 (average 16) f.s. on the fore, 

 middle and hind coxa respectively, and each with 5-12 h.s. ; fore coxa without coxal bristles ; 

 apical seta long, about as long as trochanter. Trochanters 25-30 u. wide ; with 6 oval sensilla, 

 5-10 f.s. and 7-10 h.s., the latter including 2 minute setae near basal ridge, one small seta on 

 outer margin and a very long apical seta which, on the fore trochanter, is 3-0-3-6 (average 3-3) 

 times as long as the width of the trochanter. Femora of medium width (34-42 \i), ratio width to 

 length of hind femur being 1 : 4-4-4-7 (average 4-6) ; with 14-22 (average 18) f.s. and 17-20 

 (average 19) h.s. on the fore, 10-18 (average 14) f.s. and 13-15 (average 14) h.s. on the middle, 

 and 11-15 (average 12) f.s. and 11-17 (average 15) h.s. on the hind femur. Tibiae 19-23 y. 

 wide, ratio width to length of hind tibia being 1 : 12-2-14-2 (average 13-2) ; each with 42-58 

 setae, of which 22-34 are ns - an d J 7-33 Is -. the latter about 1 1 times longer than width of tibia ; 

 apical spur about the same size on all tibiae. Tarsus 19-23 \i wide, hind tarsus 4-5-5-5 (average 

 4-9) times longer than wide ; each with 2-8 f.s. and 13-25 h.s. ; tarsal digitules subequal, 

 somewhat longer than claw. Claws long, about i| times as long as width of tarsus ; slightly 

 curved, with small denticle near tip ; ungual digitules subequal, about as long as claw. 



Abdomen 520-600 (average 572) |j. long and 240-300 (average 270) \l wide. 



Segments I -VI I : a small tergite occasionally present on each side on anterior margin of 

 segment II ; sternites consisting of transverse plates on all segments, these usually less well 

 sclerotized medially. Caudal extension of segment VII small, rounded, weakly sclerotized 

 lateroventrally. Dorsal setae : 0-2 (average 0-4), 0-3 (average i-i), 3-10 (average 6-3), 3-10 

 (average 5-9), 2-5 (average 3-2) and 0-4 (average 2-5) f.s. on segments II-VII respectively, and 

 usually with one h.s. on each side on segments I and IV-VII. Pleural setae absent on segments 



Coxa 



Trochanter 



Femur 



Tibia 



Tarsus 



Claw 



Total 



59-68 



76-84 



186-198 



272-319 



110-122 



30-34 



736-806 



(61) 



(79) 



(I9i) 



(292) 



(116) 



(33) 



(772) 



57- 6 7 



72-80 



175-198 



270-315 



103-114 



28-31 



711-789 



(60) 



(75) 



(183) 



(291) 



(109) 



(29) 



(748) 



61-68 



72-84 



177-217 



277-323 



99-114 



30-34 



722-809 



(66) 



(76) 



(183) 



(296) 



(106) 



(32) 



(758) 



