[86 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Tarsus length 



67-76 (73) 



67-79 (74) 



70-82 (76) 



h.s. 



10-12 (111) 



10-13 ("-8) 



11-15 (133) 



Claw length 



21-24 (23) 



21-24 (23) 



21-24 (23) 



Total length of leg 



589-659 (628) 



580-647 (613) 



613-689 (656) 



Abdomen : 540-578 (560)0. long and 380-410 (395)0. wide. Tergites of segments I, II and 

 sometimes III weak and narrow ; that of segment VIII large. Sternites of segment VIII 

 ill-defined. Ostioles absent. Abdominal setae on each side : Dorsal setae 4—6 on segments I 

 to IV, 3-4 on segment V, 3 on segments VI and VII, and 2-3 on segment VIII, including a 

 slightly longer seta. Pleural setae 3-4 on segments I and II, 4-5 on segments III to VII, and 

 4 on segment VIII, including a considerably longer seta (about 90 [jl long). Ventral setae 1 

 on segment II, 2-3 on segments III to VII, and 1 on segment VIII. 



Setae of glandular pouch only include a pair of 168-177 (173)0. long tail setae, the ratio their 

 length to the total length of body being 1 : 8-1-9-0 (8-6). 



Genital segment : Genital capsule moderately large, 177-183 (180) o. long and no[z wide, i.e. 

 the ratio 1-6-1-7 ( I- 65) : i> and the ratio its length to the total length of body 1 : 8-1-8-3 (8 - 2). 

 Style undulating and apically pointed in alteral view. Anal opening about 24(1 in diameter. 

 Aedeagus with well sclerotized lateral margins and tapering towards a sharply pointed tip. 

 Setae of genital segment on each side : Dorsally two conspicuously long setae always present 

 near the base of the style ; ventrally 7-9 (8-o) slightly smaller setae occur on the genital capsule. 



Material : 3 specimens only were available, collected by A. Dziedzicka, on 

 Ulmus sp., in Mogila, nr. Nowa Huta, nr. Krakow, Poland, 26. iv. 1963. 



(B) The brachypterous form (Text-fig. 49) 



These males rather robust, with the abdomen slightly broader than the thorax ; compara- 

 tively large, with short antennae and short legs. Mounted specimens 1274-1470 (1358)11 long, 

 336-378 (350)11 wide at mesothorax and 546-938 (686)0 wing expanse. 



Body setae : Antennae with numerous fleshy and a few hair-like setae, about 31 o long. 

 Body and legs with much shorter hair-like setae only. 



Head : Subtetrahedron ; subtriangular in dorsal view and rather rounded in front view ; 

 ventral preocular depression absent. Length from apex to postoccipital ridge 128-153 ( x 4 ) a '• 

 from apex to neck 183-214 (192)0 ; width across the genae 226-244 ( 2 35)( x - Midcranial 

 ridge cruciform. Postoccipital ridge laterally forked into anteriorly and posteriorly directed 

 branches. Dorsomedial part of epicranium slightly raised. Pre- and postocular ridges well 

 separated ; preoral ridge slender. Eyes : Dorsal simple eyes slightly projecting beyond the 

 outer margins of the head in dorsal view ; their corneae 15-21 (18)0 in diameter and separated 

 by 140-156 (150)0 ; i.e. 6-7-9-8 (8-2) times their diameter apart. Ventral simple eyes 12-18 

 (16) o in diameter and 61-82 (70) o apart. Ocellus vestigial and only represented by a sclerotized 

 spot, attached to the postocular ridge by means of a slender sclerotized arm. Cranial 

 apophysis apically bifurcate. Tentorial bridge stout ; anterior tentorial arms join the cranial 

 apophysis separately (Text-fig. 46, I). Mouth opening situated on a large mouth tubercle 

 posteriorly. Dorsal head setae 8-14 (io-i) on each side ; each gena usually with 2-4 and 

 occasionally 1 or 5 (av. 2-9) genal setae. Ventral head setae : Setae between the ventral eyes 

 absent ; 3-5 (4-2) just anterior to the preocular ridges, forming on both sides a transverse 

 irregular row ; 1-2 (i-6) on each side of the ventral arm of the midcranial ridge. 



A small body of unknown homology (X) always present on each side of the dorsal arm of the 

 midcranial ridge, near the apex of the head. 



Antennae : Rather moniliform ; 10-segmented ; 491-583 (534)0. long, i.e. shorter than 



