76 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



lergites very small and weakly sclerotized, without striations and without setae. Pleural 

 structures typical of family. Sternum with transverse ridge strong, median ridge absent (occa- 

 sionally a small basal stalk may be present) and triangular sclerite with lines arching latero- 

 anteriorly. A ntepr cisternal setae absent ; prostemal setae : 7-16 (average 11) f.s. and 0-2 

 (average 0-7) h.s., scattered over the sternal area but not occurring anterior to the spiracles. 



Mesothorax. Mesoprephragma with shallow emargination. Prescutum more than twice as 

 wide as long (average 181 and 82 \j. respectively) ; anterior margin curved ; laterally bounded 

 by the prescutal ridges and posteriorly by the prescutal suture ; slightly more heavily sclerotized 

 medially but not reticulated. Scutum. Median membranous area subrectangular ; 72-91 

 (average 83) [x long and 1-92-2-48 (average 2-11) times as wide (width 152-220, average 175 (x) ; 

 with 2-4 (average 2-8) h.s. Scutellum 65-80 (average 74) \x long and 141-182 (average 163) [jl 

 wide, ratio being 1 : 2-0-2-3 (average 2-2) ; tubular, with a large ventral foramen ; occasion- 

 ally with one or two h.s. Postnotum with anterior margin irregular and partly overlapped by 

 the metathoracic fold ; postnatal apophysis and postalare well developed, the latter densely 

 reticulated distally. Mesopostphragma with moderately deep emargination. Mesopleuron. 

 Mesopleural ridge strong, not interrupted above coxal articulation ; pleural apophysis and 

 pleural wing process well developed, the latter connected with episternum by a narrow basalare. 

 Subalare small. Episternum not reticulated ; subepisternal ridge well developed, but below 

 membranous cleft indistinct and only marked by a band of dark sclerotization. Epimeron 

 small. Eater opleurite not bounded by an extension from marginal ridge. Basistemum large, 

 about 236 u. wide and 170 a. long, i.e. 1-8-2-2 (average 2-1) times longer than membranous area 

 of scutum ; with strong median ridge and bounded by strong marginal and precoxal ridges ; 

 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 4-10 (average 7-3) h.s. Third axillary wing sclerite with a pronounced ventral 

 projection at its base. Additional sclerite well defined. Antemetaspiracular setae absent. 



Metathorax. Metanotum with anterior margin desclerotized medially ; suspensorial sclerites 

 absent. Postnotum consisting of a transverse 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. Vestigial precoxal ridge present. Episternum reduced to a small 

 subtriangular plate ; epimeron produced posteriorly. Metathoracic spiracle similar to meso- 

 thoracic one. Dorsospiracular setae absent. Postmetaspiracular setae : 0—15 (average 7-5) f.s. 

 and 1-3 (average 1-2) h.s. Metasternum represented by two small, irregular sclerites. Anterior 

 metasternal setae : 11-18 (average 14) f.s. and occasionally one h.s. ; posterior metasternal 

 setae : 0-3 (average 1 -6) f.s. 



Wings hyaline ; short (length 1200-1280, average 1231 u.) and of medium width (500-530, 

 average 516 u.), the ratio width to length being 1 : 2-34-2-42 (average 2-38) ; alar lobe and 

 alar setae absent. H alter es absent. 



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

 ratio length of hind leg to body length is 1 : 2-02-2-34 (average 2-17). Length of segments 

 (in u.) : 



Leg 



Coxa 



Trochanter 



Femur 



Tibia 



Tarsus 



Claw 



Total 



I 



59-72 



76-95 



175-209 



239-293 



91-110 



26-28 



667-803 





(67) 



(87) 



(i97) 



(280) 



(103) 



(27) 



(759) 



II 



62-76 



84-103 



160-190 



251-304 



106-118 



27-30 



690-813 





(70) 



(95) 



(i79) 



(281) 



(113) 



(28) 



(766) 



III 



65-82 



84-106 



171-201 



255-317 



101-125 



27-32 



701-851 





(76) 



(100) 



(189) 



(295) 



(116) 



(30) 



(805) 



Coxae 3-6 (average 4-6) f.s. on the fore and 10-20 on the middle and hind coxa, and 10-20 

 h.s. on each ; fore coxa with 3-6 (average 4) pointed coxal bristles (about as long as segment) ; 

 apical seta about § as long as trochanter. Trochanters 30-34 y. wide ; with 6 oval sensilla, 

 6—10 f.s. and 5-9 h.s., the latter including 2 minute setae near basal ridge, one small seta on 



