GovipJiHs. 1 5 5 



eyes short, notched at middle ; small elevated spots 

 behind ex'es. Antenn;e, two basal joints short, L^iobular, 

 second shortest ; third nearl}- t\\ ice a long as botli 

 basal, dilated, somewhat bent up at tip ; fourth rudi- 

 mentary Mask reachinc^ to the fore-legs, cjuadrangular, 

 channelled in middle, sides bent up, cut straight at 

 fore-border, middle third finel}' denticulated, and sur- 

 mounted by comb of bristles. Palpi short, arcuated, 

 fineh- denticulated at basal half, end hook stout ; 

 mo\-able hooks long and sharp. I'rothorax oval, fore- 

 border elevated, a flat impression on each side. 

 Wing-cases reaching nearly to fourth segment. I-egs 

 strong, formed for burrowing. Hind-legs more widely 

 separated at base. Fore and middle legs short, about 

 equal size. Femora short, stout, bent inward ; tibia; 

 longer, with strong outer spine at anterior end ; tarsi 

 two-jointed, short, basal joint \er\- short, claws sharp. 

 Hind-legs longer, reaching nearl}- to ninth segment, 

 flat ; tarsi three-jointed, second half the length of third. 

 Abdomen long, flat, lanceolate, decreasing in size 

 after sixth segment. Side border sharp ; segments 2 

 to 9 with large flat spots. No dorsal hooks. Segments 

 6 to 9 with lateral spines ; spines of ninth half as 

 long as tenth segment. Segments of equal length, 

 except the tenth, which is small, about one-third of 

 foregoing, and c\-lindrical. Anal appendices a little 

 longer than last segment, p}-ramidal, sharp. Superior 

 one thickened at basal half; lateral superior ones 

 shorter, sharp. I'^emale has abdomen a little broader, 

 and at end of eighth ventral segment a small bifid 

 tubercle, superior appendix not thickened at basal half" 

 (L. Cabot, " Immature State of the Odonata," Part I. 



