io8 



MORPHOLOGY AND TAXONOMY OF ADULT MALES 



length to terminal segment), the ratio length of segments III to X being 10— ii (1-05) : 1 ; 

 segment III about 25^ wide, the ratio its width to its length being 1 : 2 6-3 3 (3-1). Segments 

 IV-X cylindrical and about 23^1 wide ; the ratio width to length of segment IX 1 : 2-9-3-6 

 (3-3). In the following table the length of the flagellar segments and the number of setae on 

 each are given : 





Ill 



IV 



V 



VI 



VII 



VIII 



IX 



X 



length in ;x 



70-82 



43-52 



43-52 



46-58 



46-58 



49-58 



49-58 



70-79 



(av.) 



(76) 



(49) 



(49) 



(52) 



(52) 



(55) 



(55) 



(73) 



f.s. 



12-15 



8-14 



9-14 



11-17 



13-17 



12-18 



13-16 



14-20 



(av.) 



(H-i) 



("•3) 



(I2"5) 



(147) 



(15-4) 



(14-8) 



(147) 



(i8-3) 



h.s. 



2-5 



i-3 



0-2 



0-2 



O-I 



O-I 



O-I 



0-2 



(av.) 



(3-9) 



(2-0) 



(I-I) 



(07) 



(o-4) 



(07) 



(07) 



(o-8) 



Antennal bristles : Each of antennal segments VIII and IX with one ventral bristle. 

 Terminal segment with 3 preapical bristles the dorsal of which is slightly shorter ; terminal 

 segment also with two capitate subapical sensory setae and one apical hair-like seta. 



Thorax : 395-578 (464) pi long. Prothorax : Pronotal ridges medially interrupted ; lateral 

 pronotal sclerites small. Post-tergites of medium size. Proepisternum with ridge-like dorsal 

 margin ; propleural ridge short and propleural apophysis small. Prosternum subtriangular, 

 narrow medially, and 37-43 (39) \i long ; with a transverse, 85-101 (89) pi long prosternal ridge 

 Prothoracic setae on each side : One medial pronotal seta usually present, but two setae may 

 occasionally occur (av. i-i) ; lateral pronotal seta 0-1 (o-6) ; post-tergital setae absent. Ante- 

 spiracular dorsal setae 3-5 (3-7) and antespiracular ventral setae 1-2 (1-2). Prosternal setae 

 2-3 (2-5). Prothoracic disc pores on each side : Medial pronotal pores 4-10 (6-3) and lateral 

 pronotal pores 3-1 1 (5-6) ; these two groups sometimes become rather difficult to separate. 

 Antespiracular dorsal pores 4-8 (5-5) ; post-tergital pores absent. Prosternal pores 1-3 (i-6) 

 forming with those of the other side a median group. 



Mesothorax : Prescutum subrectangular in dorsal view ; 64-76 (70)0. long and 11 6-1 3 7 

 (i25)[x wide, the ratio being 1 : 1-6-2-0 (1 : i-8) ; prescutal ridges well developed and prescutal 

 suture well marked. Scutum with well sclerotized anterolateral extremities, and with a longi- 

 tudinal median narrow membranous area. Scutum 95-119 (ioi)pi long, i.e. the ratio length of 

 prescutum to scutum 1 : 1-3-1-8 (1-4). Prealare, prealar ridge, triangular plate and tegula well 

 developed. Scutellum pentagonal in dorsal view ; 55-70 (58) pi long, and 98-125 (107) u. wide, 

 the ratio being 1 : 1-7-1-9 (1 : i-8), and the ratio its length to the length of scutum 1 : i-6- 

 i-8 (1 : 1-7). Postalare with well separated anterior and posterior postalar ridges. Postnotal 

 apophysis strong. Mesopleuron : Mesopleural ridge interrupted above the coxal articulation ; 

 basalare well developed. Mesepisternum semimembranous ; lateropleurite narrow ; mesepimeron 

 well sclerotized. Mesosternum : Basisternum 122-143 (128) pi long and 183-229 (195) pi wide ; 

 marginal, precoxal ridges and furca well developed. Mesothoracic spiracles 18-24 (21) [*■ wide 

 at opening, and with a 37-46 (43)0. long supporting bar. Mesothoracic setae on each side : 

 Prescutal setae 1-2 (1-7) ; scutal setae 7-10 (8-i) ; scutellar setae usually 2 and occasionally 3 

 (av. 2-1) ; tegular setae 2-3 (2-2). Postmesostigmatal setae 3-5 (4-3), in a latero-ventral group 

 behind the spiracle ; basisternal setae 7-1 1 (9-2). Mesothoracic disc pores : Mesospiracular 

 pores comparatively numerous, 4-7 (51) posteriorly associated with each spiracle. 



Metathorax : Metapostnotal sclerites and metapostnotal ridge well developed. Metapleural 

 ridge with the usual attenuation near the middle at the point of origin of the metapleural 

 apophysis ; metapleural wing process small. Precoxal ridge of metathorax, metepisternum and 

 metepimeron distinct ; metasternal apophysis small. Metathoracic spiracles identical with the 

 mesothoracic. Metathoracic setae on each side : Metatergal setae always include a group of 

 3 sublateral setae, and one isolated submedially ; one metapleural seta usually present. 

 Anterior metasternal setae 2-4 (3-1) ; posterior metasternal setae 1-3 (1-9). Metathoracic disc 



pores on each side : Metaspiracular pores 2-4 (2-6) ; anterior metasternal pores 1-2 (1-5) ; 



posterior metasternal pores absent. 



