152 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



area of the ventral preocular depression, forming on both sides a transverse irregular row ; 

 2-3 (2-2) setae on each side of the ventral arm of the midcranial ridge. Head disc pores entirely 

 absent. 



Antennae : Filiform ; normally 10-segmented ; 668-769 (729)^ long, i.e. much longer 

 than half the total body length (ratio 1 : 1-2-1-6, av. 1-3), and longer than the hind legs (ratio 

 1 • 1-1-3, av. 1-2 : 1). Scape 43-49 (46) \i long and 46-49 (47) jx wide at base ; almost always 

 with 4, and occasionally 5 h.s. (av. 4-1). Pedicel 58-64 (6i)|a long and 37-40 (38)11 wide ; 

 with 10-18 (13-1) f.s., 3-8 (5-3) h.s. and a sensillum placodeum. Flagellar segments with a 

 few apically knobbed, about 400. long capitate sensory setae. Segment III club-shaped, longest 

 of all and about 27^ wide, the ratio its length to the length of segment X 1-2-1-4 ( I- 3) : *• an( i 

 the ratio its width to its length 1 : 3-1-3-7 (3-3). Segments IV to X slightly narrower, the 

 ratio width to length of segment IX being 1 : 2-7-3-3 (3-0). The lengths of the flagellar 

 segments and the number of setae on each are given in the following table : 



III IV V VI VII VIII IX X 



length in (x 



85-101 



67-82 



70-82 



70-85 



67-82 



70-85 



64-79 



70-73 



(av.) 



(92) 



(76) 



(79) 



(82) 



(76) 



(79) 



(73) 



(7i) 



f.s. 



12-19 



10-20 



10-19 



13-20 



13-20 



12-21 



14-20 



13-16 



(av.) 



(15-6) 



(14-6) 



(I4-I) 



(16-3) 



(17-8) 



(18-4) 



(i7-9) 



(147) 



h.s. 



2-4 































(av.) 



(3-4) 































set. ca. 



1-2 



2-3 



1-2 



3-4 



4-5 



5-6 



4-6 



4 



(av.) 



(i-6) 



(2-7) 



(i-3) 



(37) 



(4-4) 



(5-3) 



(5-i) 



(40) 



Antennal bristles inconsiderably stouter than the fleshy setae ; segments VIII and IX each 

 with a ventral bristle. Terminal segment with 3 preapical bristles and 1-2 apical sensilla 

 basiconica. 



Thorax : 418-479 (448) u. long. Prothorax : Pronotal ridges medially interrupted by a weak 

 sclerotization. Lateral pronotal sclerites and post-lergites distinct. Dorsal margin of pro- 

 episternum ridge-like. Prosternum triangular, 12-18 (15) [a long ; posteriorly bounded by the 

 transverse, 82-98 (92) [i long prosternal ridge. Prothoracic setae on each side : Medial pronotal 

 setae absent ; lateral pronotal seta 0-1 (0-3) ; post-tergital and antespiracular dorsal setae absent. 

 One antespiracular ventral seta always present ; prosternal setae almost always absent although 

 one seta may occur on one side (av. 0-2). Prothoracic disc pores on each side : Medial and 

 lateral pronotal pores 0-1 (o-8) and 0-2 (0-9) respectively ; antespiracular dorsal pores absent. 

 Prosternal pores 1-2 (1-3). 



Mesothorax : Prescutum 67-79 {73)11 long and 116-137 (i28)u. wide, the ratio being 1 : i-6- 

 1-9 (i-8) ; laterally and posteriorly bounded by the prescutal ridge and the prescutal suture. 

 Scutum well sclerotized antero-laterally and with a median longitudinal membranous narrow 

 area ; 73-89 (76)(x long, i.e. the ratio lengths of prescutum to scutum 1 : 1-0-1-2 (i-i). 

 Prealare, prealar ridge, triangular plate, anterior and posterior notal wing processes well developed. 

 Scutellum 49-61 (55)0. long and 82-104 (92)^1 wide, i.e. the ratio 1 : 1 -6-1-8 (1-7), and the ratio 

 its length to the length of the scutum 1 : 1-3-1-5 (1-4). Postalare with well separated anterior 

 and posterior postalar ridges. Postnotal apophysis strong. Mesopleuron : Mesopleural ridge 

 interrupted above the coxal articulation ; basalare comparatively slender. Mesepisternum 

 and mesepimeron distinct ; later opleurite narrow. Mesosternum : Basisternum 1 13-134 (i22)[A 

 long and 189-232 (204) }x wide ; bounded by the marginal and the precoxal ridges ; furca well 

 developed. Mesothoracic spiracle 21-24 (23) [z wide at opening, with a 40-46 (43) (x long 

 supporting bar. Mesothoracic setae on each side : Prescutal setae 2-4 (3-1) ; scutal setae 4-6 

 (4-9) ; scutellar setae 2-3 (2-4). One tegular seta always present. Postmesostigmatal setae 

 2—4 (3-1) behind the spiracles, and one medially separated. Basisternal setae 5-7 (5-3). Meso- 

 thoracic disc pores : Mesospiracular pores 1-2 (i-i) ; postmesostigmatal pores absent. 



Metathorax : Metapostnotal sclerites well defined and metapostnotal ridge weakly developed. 



