58 



MORPHOLOGY AND TAXONOMY OF ADULT MALES 



68-91 (average 78) u. long and 1-79-2-17 (average 1 94) times as wide (width 137-163, average 

 150 u.) ; with 1-2 (average 1-7) h.s. Scutellum 57-68 (average 64) \i long and 160-171 (average 

 166) [x wide, the ratio being 1 : 1-8-2-2 (average 19) ; not tubular ; without setae. Post- 

 notum with anterior margin irregular, not overlapped by the metathoracic fold ; postnotal 

 apophysis and postalare well developed, the latter densely reticulated distally. Mesopost- 

 phragma small, with moderately deep emargination. Mesoplenron. Mesoplenral ridge strong, 

 not interrupted above coxal articulation ; pleural apophysis and pleural wing process well 

 developed, latter connected with episternum by a narrow basalare. Subalare small. Epi- 

 sternum not reticulated ; subepistemal ridge well developed, but below membranous cleft in- 

 distinct and only marked by a band of dark sclerotization. Epimeron small. Later opleurite partlv 

 bounded anteriorly by an extension from marginal ridge. Basisternum large, about 210 [z wide 

 and 151 [i. long, i.e. 1-7-2-2 (average 1 -9) 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 0-4 

 (average 1-9) h.s. Third axillary wing sclerite with a small ventral projection at its base. 

 Additional sclerite well defined. Antemetaspiracular setae absent. 



Metathorax. Metanotum with anterior margin desclerotized medially ; sitspensorial sclerites 

 absent ; a small, additional sclerite sometimes present anterior to postnotum. Postnotum 

 consisting of a transverse sclerite on each side. Metatergal setae : occasionally one h.s. on 

 each side. Pleural ridge reduced, extending only for a short distance above coxal articulation. 

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

 produced posteriorly. Metathoracic spiracle similar to mesothoracic one. Dorsospiracular 

 setae absent. Postme/aspiracular setae : 2-6 (average 4) f.s. and 0-1 (average 0-7) h.s. Mela- 

 sternum represented by a weak, transverse plate. Anterior and posterior metasternal setae 

 absent. 



Wings hyaline ; long (length 1260-1330, average 1295 y.) and broad (width 570-600, average 

 585 y.), ratio width to length being 1 : 2 19-2-24 (average 2-22) ; alar lobe and alar setae absent. 

 Halteres absent. 



Legs short and moderately slender, with the fore pair usually longest and the middle pair 



shortest ; ratio length of hind leg to body length is 1 : 

 segments (in \l) : 



Leg Coxa Trochanter Femur Tibia 



I 65-80 91-99 198-213 285-304 



(74) (95) (207) (295) 

 II 68-80 87-93 182-194 281-296 



(75) (9i) (189) (289) 

 III 76-91 91-99 179—190 289-300 



(83) (95) (184) (296) 



1-89-2-05 (average 1-99). Length of 



Tarsus 

 99-122 



(107) 

 99-106 



(102) 

 99-110 



(106) 



Claw 

 23-27 



(26) 

 23-29 



(26) 

 21-29 



(26) 



Total 

 785-828 



(804) 

 762-785 



(77i) 

 771-800 



(788) 



Coxae with 11-16 (average 14) f.s. on the fore and 16-22 on the middle and hind coxa, and 

 each with 9-12 h.s. ; fore coxa without coxal bristles ; apical seta about A as long as trochanter. 

 Trochanters 30-34 u. wide ; with 6 oval sensilla, 6-14 f.s. and 5-8 h.s., the latter including 2 



Fig. 13. Phyllostroma myrtilli (Kalt.), lateral view. 



