1 34 l^ritish Di-agojiflies. 



tf) belong to a thin transparent outer la}'er. [Eggs 

 removed from outside the vulvar scale of a worn female 

 captured at Strathglass, while apparently ovipositing 

 (C. A. Briggs, /// ////. 13. vii. 99)]. 



Nymph. 



Mr. L. Cabot describes the nymph of S. 11 ic tallica in 

 the following terms : " Length, 24mm. ; breadth, 9mm. 

 Body oblong, enlarged and truncate behind, about 

 naked ; head short, narrower than abdomen, half as 

 long as broad, slightl}* rounded in front, straight 

 behind ; sides j:)r()jecting ; conical eyes, slightl}' 

 prominent ; behind the e)-es an undulating transverse 

 crest, making on each side of vertex a light cur\"e, a 

 little elevated, with a comb of fine bristles ; forehead 

 about flat, vertex small, rounded, ocelli not indicated ; 

 front margin slightl}- rounded, with a fringe of long- 

 cilia ; occiput in middle with two small conical 

 tubercles, and on each side near the margin with a 

 bunch of half-a-dc>zen lon<7, thick hairs ; antenna:; lontj 

 exceeding the lower margin of palpus ; basal joints a 

 little thicker ; first longer than broad ; second longer 

 than first; third not quite as long as the two basals 

 together; fourth half the length of third ; fifth to 

 seventh equal, each a little shorter than third ; seventh 

 subuliform, sharp. Mask extending between front legs 

 spoon-shaped, as long as broad ; basal part four times 

 broader in front than at base ; front border triangularly 

 produced, obtuse-angular ; palpus large, triangular, edge 

 straight, with about nine interlocking teeth ; movable 

 hook short, straight, sharp. Prothorax short, narrower 

 than head, slightK- rounded behind ; middle third of the 



