OF THE FAMILY COO 1 D \K 99 



on or near median ridge. I'urca well developed. Mesothoracic spiracle with well developed 

 peritreme ; postmesospiracular setae numerous, consisting of 50-87 (average 66) f.s., arranged in 

 a broad hand behind the spiracles and presternum, often with a few on the episternae. Tegitla 

 small, membranous bulge with a small weak sclerite posteriorly and with 2-6 (average 3-1) h.s. 

 Third axillary wing sclerite with a small, pointed, ventral projection at its base. Additional 

 sclerite small, well sclerotized. Antemetaspiracular setae : 2-4 (average 3-1) f.s. 



Metathorax. Metanotum with posterior margin usually strong medially ; suspensorial 

 sclerites absent ; occasionally a small, additional sclerite present anterior to postnotum. Post- 

 notum consisting of 2 small sclerites, one on each side Metatergal setae : usually 2 h.s. on each 

 side, one laterally and one more medially, and usually with one (0-3) f.s. near the lateral h.s 

 Pleural ridge considerably reduced, extending only a short distance above coxa] articulation. 

 Vestigial precoxal ridge present. Episternum reduced to a small subtriangular plate ; epimeron 

 produced posteriorly. Mctathoracic spiracle similar to mesothoracic one. Dorsospiracuiar 

 setae : 9-19 (average 13) f.s. and in one case 2 lis Pistmetaspiracular setae : 14-23 (average 

 18) f.s. and usually one (0-2) h.s., one or more f.s. occurring anterior to rest, close behind spiracle. 

 Metasternal plate weak and irregular, but more heavily sclerotized anteriorly Anterior meta- 

 sternal setae : 47-78 (average 63) f.s., occasionally one lis ; posterior metasternal setae : 18-41 

 (average 27) f.s. 



Wings hyaline ; of medium length (1540-1600, average 1571 jjl) , but comparatively broad 

 (720-780, average 763 (j. wide), the ratio width to length being 1 : 203-214 (average 2 06) ; 

 alar lobe and alar setae absent. Halteres absent. 



Legs long and slender, with fore pair shortest anil hind pair longest ; ratio length of hind 

 leg to body length is 1 : 151 103 (average 1*56). Length of segments (in y.) : 



Leg Coxa Trochanter Femur Tibia Tarsus Claw Total 



I 65-80 76-89 }°4-334 498-536 194-217 25-30 1 180-1286 



(74) (84) (317) (5i6) (203) (28) (1221) 



II 99-122 106-118 277-300 490-543 [86 209 28-30 1203-1301 



(in) (in) (289) (517) (197) ( 2 9) (1253) 



III 101-114 1 14-125 277-304 532-597 200-213 27-31 1277-1382 



(in) (117) (290) (560) (206) (30) (1314) 



Coxae : 16-24 (average 19) f.s. on the fore and 26-34 (>n tne middle and hind coxa, and each 

 with 6-12 h.s. ; fore coxa with 2-4 (average 2-6) capitate coxa] bristles ; apical seta about J 

 as long as trochanter. Trochanters 29-34 (^ wide ; with 6 oval sensilla ; with 8-10 (average 9) 

 f.s. on the fore and 14-20 on the middle and hind trochanter ; each with 6-8 h.s. which include 

 2 minute setae near basal ridge, one small seta on outer margin and a long apical seta which, on 

 the fore trochanter, is 1 7-1 9 (average 1 -8) times as long as width of trochanter. Femora 

 slender, 42-49 |j. wide, the ratio width to length of hind femur being 1 : 5-98-6-52 (average 

 6-24) ; with 35-49 f.s., and with 17-28 (average 22) h.s. on the fore and 10-18 on the middle and 

 hind femur. Tibiae 23-27 [i wide ; ratio width to length of hind tibia being 1 : 206-22 4 

 (average 21-2) ; each with 105-141 setae of which 19-37 are h.s. and 80-107 f- s - the latter 

 about twice as long as width of tibia ; apical spur about the same size on all tibiae. Tarsi 

 20-25 (* wide, hind tarsus 8-1-9-3 (average 9) times longer than wide ; each with 30-46 f.s. 

 and 13-25 h.s. ; tarsal digitules subequal, slightly longer than claw. Claws of medium length, 

 somewhat longer than width of tarsus ; slightly curved, with small denticle near tip ; ungual 

 digitules subequal, about as long as claw. 



Abdomen 620-700 (average 676) \x long and 370-500 (average 405) \x wide. 



Segments I-VII : tergites present on anterior margin of segments II— III, represented by 3 

 small sclerites — one mediallv and one on each side ; sternites represented by a transverse plate 

 on segments II, III, V— VII. Caudal extension of segment VII large, reaching level of posterior 

 margin of segment VIII, tapering, weakly sclerotized. Dorsal setae : usually a few (0-5, 

 average 2-2) f.s. on the 1st and occasionally one or two on each of segments II— V ; usually one 

 h.s. on each side on all segments. Pleural setae : consisting of dorsopleural setae : 5-16 (average 



