I92I.] R J. TitYARD : Epiofyhlehia laidlawi. loi 



Two patches of dirt which I failed to remove from the wing 

 are shown in situ in text-fig. 3. They do not hide any important 

 details. 



The legs are fairly short, the hind femora reaching nearly to 

 the middle of the sixth abdominal segment. The femora are 

 fairly wide, flattened; they carry two longitudinal ridges anteriorly 

 and a single well marked ridge posteriorly. The tibiae are much 

 narrower than the femora, but similarly ridged. The tarsi are 

 three-jointed, not constructed for burrowing or digging, and having 

 the third or apical joint longc^st. The claws are well developed, 

 with strongly hooked ends. Ventrally, the last tarsal joint carries 

 a well defined ridge furnished with hairs on either side, and projec- 

 ting slightly as a small rounded prominence between the claws. 



Abdomen broad, subcylindrical from base to seventh segment, 

 then tapering rapidly to anal end. Dorsal surface generally convex, 

 carrying a low median ridge interrupted segmentally, and having 

 on each segment, from i to S on either side of this median ridge, 

 a set of four shallow hollows separated by narrower, low ridges. 

 On segments 2 to g the median ridge is notched anteriorly by a 

 .somewhat triangular, narrow slit or hollow. The ridges are more 

 strongly rugose or tuberculated than the hollows. Neither dorsal 

 nor lateral spines are present, but the lateral angles of the segments, 

 dividing the dorsal from the ventral surface, are strongly marked. 

 The ventral surface is somewhat flattened, trilobate in form, the 

 middle division being slightly convex, the two lateral divisions flat- 

 tened. From I to 7, the segments become consecutively slightly 

 longer and wider; 8 is somewhat longer than 7, but not quite so 

 wide ; 9 is both shorter and narrower than 8, but is produced back- 

 wards on either side so as to embrace 10, which is very narrow, 

 and about half as long as 9 measured mid-dorsall}'. The rudiments 

 of the male valvules are visible ventrally on segment 8. 



Anal Appendages : — Caudal gills are not present. The appen- 

 dages may be said to be generally similar to those of the Anisop- 

 tera, but po.ssess at least one feature not before noted in any type 

 of anal appendage within the Odonata (text- fig. 4). 



The appendix dorsalis (text- fig. 4 ad) is small, not as long as 

 segment 10, and triangular in shape. Dorsally it carries a raised 

 area which is somewhat bifid in the middle of its distal margin 

 (text-fig. 4, ^) ; this would appear to indicate the position of the 

 involucre of the male inferior appendage. 



On either side of the appendix dorsalis can be seen the small 

 and somewhat conical cercnids {c'), which become the superior 

 appendages of the imago. 



The cerci (text-fig. 4c) are broad and somewhat leaf like ap- 

 pendages, more than twice as long as the appendix dorsalis. They 

 are placed far apart at their bases, which are broad, and converge 

 inwards towards their tips, which are well pointed. Their internal 

 sides, bordering the appendix dorsalis, appear to be rather com- 

 plexly folded ; but this may be partly due to the mode of preser- 

 vation of the specimen. 



