588 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



IT-XT, first to tenth abdominal terga. 



It, subdivision of first abdominal tergum. 



Tg, tegula or its rudiment. 



tg, tegular plate of Lepidopteran notum carrying the tegula. 



tgA, tegular arm of pleural vping process in Lepidoptera supporting tegular 



plate of notum. 

 Tn, trochantiu. 

 tn, subdivision of trochantiu. 

 Tna, accessory trochantinal plate. 

 TnC, trochantinal articulation of coxa. 



TnCjcP, trochantinal ( pseudopleural ) coxal process in Plecoptera. 

 TnR, trochantinal (pseudopleural) ridge m Plecoptera. 

 TnS, trochantinal (pseudopleural) suture in Plecoptera. 

 y, entodorsum or V-shaped ridge on undersurface of meso- and metathoracic 



nota. 

 V, V-shaped line formed on surface of notum by the entodorsum (V) or 



V-shaped ridge of undersurface. 

 W, wing. 

 w, transverse ventral ridge of metanotum in Coleoptera or its line on dorsal 



surface of notum dividing the scutum into two i)lates. 

 WP, wing process of pleurum. 



M iaceUaneous lettering. 



a, postepimeral strip of pronotum in Odouata (5, 7, 12). 



b, I'od connecting prosternum and mesosternum in Odonata (6, 10, 11). 



c, rod connecting parapterum with head of costa in Ephemerida (1, 4). 



d, sternal coxal condyl in nymi)hs of Odonata (11, 16). 



e, sternal pit or pits marking the location of the furca (10, 11). 

 /, posterior arms of the metanotum in Euplexoptera (06). 



g, pi'othoracic spiracular plates in Odon.ita attached to mesothorax (18). 



h, anterior arm of pleural wing process in Odonata (IS, 19). 



i, points of articulation of pseudonotum (postscutellum) in Coleoptera with 



epimera (132-137, 139, 140). 

 ;, small plates yoking mesonotum and metanotum in Blatella (38, 40). 

 k, coxal condyle of epimerum in Benacitfi (84, 89). 

 1, median sternal ai)odeme of Pliossus (152). 

 mi, individual i)lates of n)icrothorax. 

 n, rod connecting pai*apterum with wing base in Euplexoptera (mesothorax 



90, metathorax 98, 100). 

 0, point of insertion of posterior muscle disk of wing in CyUene (140). 

 p, small sclerite in prothorax of Phassus (152) bearing procoxa. 

 q, yoke plates between mesonotum and metanotum in Coleoptera (127, 128, 



131). 

 r, common base of anal veins fused with end of scutellum in Dytiscus (136, 



137). 

 s, ridges on under surface of meso- and metanotum in Acridiidiie (54) or lines 



formed by them on doi'sal surface (53). 

 It, anterior subdivision of first abdominal tergum (IT) in Acridiidse (57). 

 tg, plate on Lepidopteran notum supporting the tegula (149, 150, 156). 

 tgA, arm of pleural wing process in Lepidoptera supporting tegular plate (tg) 



of notum (15.3, 154). 

 tn, subdivision of trochantiu in Blattidie (32, 35). 

 u, lobe at posterior lateral angles of prescutum in Diptera (175, 180). 



