295 



and R3 fused, articulation A7 absent (SG2.: R2 and R3 separated, articulated in A7) (63) 

 Regions Rlt and Rlc reaching far posteriad and probably fused with parts of the broadly 

 interconnected regions Rid and Rlv: articulations A8 and A9 and membranous area 17 

 absent; sclerite RIM (SG2.2.: Rlt and Rlc restricted to a more anterior area and separated 

 from the broadly interconnected Rid and Rlv: A8, A9, and 17 present; SG2.: Rlt and 

 Rlc restricted to a more anterior area and separated from the narrowly interconnected Rid 

 and Rlv: A8, A9, and 17 present; BM: Rlt restricted to a more anterior area and not 

 connected with Rid or Rlv; Rlc restricted to a more anterior area ventrally but possibly 

 extending more posteriad dorsally, connected with both Rid and Rlv which are separated 

 from each other: AS and A9 absent but 17 present) (64)! Muscle r3 absent (BM: r3 present) 



(65) Ridge pva longitudinally orientated (BM: pva transversely or obliquely orientated) 



(66) Sclerite R2 occupying left-ventral and anterior walls of invagination cbe, broadly 

 connected with Rlt (SG2.: R2 restricted to left-ventral base of cbe, separated from Rlt) 



(67) Articulation A6 absent (SG2.: A6 present). 



Subgroup 2.2.3.: (68) Membranous basal part 30 of hook hla very extensive, hla very 

 deeply retractable (SGs2.2.1.+2.2.3.: 30 extensive, hla rather deeply retractable; SG2.: 30 

 very narrow, hla hardly retractable) (69) Base of hook hla at left posterior edge of left 

 complex (SGs2.2.1.-i-2.2.3.: Base of hla in middle part of left ventral wall; SG2.: Base of 

 hla in anterior left ventral wall) (70) Infolding fpe present (BM: fpe absent) (71) Ive- 

 apodeme present (BM: Ive-apodeme absent) (72) Common sclerotisation of processes paa 

 and pda with stout basal ring (BM: Common sclerotisation of paa and pda not with stout 

 basal ring) (73)! Tendon tre and muscles s8 and b4a,b absent (SG2.: tre, s8, and b4a,b 

 present; BM: presence of tre and s8 unclear, b4a,b present) (74) Region Rlc fused with 

 the broadly interconnected regions Rid and Rlv: articulations A8 and A9 and membranous 

 area 17 absent; sclerite RIN (SG2.2.: Rlc separated from the broadly interconnected Rid 

 and Rlv: A8, A9, and 17 present; SG2.: Rlc separated from the narrowly interconnected 

 Rid and Rlv: A8, A9, and 17 present; BM: Rlc connected with both Rid and Rlv which 

 are separated from each other: A8 and A9 absent but 17 present) (64)! Muscle r3 absent 

 (BM: r3 present) (75) Groove rge absent (SG2.: rge present) (76) Hook-curvature on 

 median end of region Rlt present (BM: Hook-curvature on Rlt absent) (77) Muscle si 

 absent (BM: si present) (78) Ventral insertion of muscle 15 on region L4n near process 

 nla // Muscle 15 present, not homologous with 15 of other subgroups (SG2: Ventral insertion 

 of 15 not on L4n // This 15 absent). 



Subgroup 2.2.3.2.: (79) Anterior insertion of muscle 114 on region L2a (SG2.: Anterior 

 insertion of 114 on L4n) (80) Lobe via small (BM: via large) (81) Process via present 

 (BM: via absent) (82) Right posterior dorsal part of left complex small (SG2.: Right 

 posterior dorsal part of left complex large) (83) Sclerite L2 divided by articulation A 10: 

 sclerites L2D, L2E (BM: L2 undivided, A 10 absent) (84) Sclerite L4K divided: sclerites 

 L4U, L4V (SG2.2.: L4K undivided) (85) Region L4v absent (BM: L4v present) (86) Right 

 insertion of muscle 12 on basal part 30 of hook hla (BM: Right insertion of 12 in left wall 

 of pouch pne on LI) (87) Muscle 130 present (BM: 130 absent) (47)! Muscle s2 absent 

 (SG2.2.: s2 extremely reduced; SG2.: s2 moderately reduced; BM: s2 not reduced and as 

 strong as si) (88) Muscles s5 and s6 divided into s5a,b and s6a,b (BM: s5 and s6 



