12 ODONATA. 



smooth spots. Anal appendices short, a little longer than spines ot 

 9th segment, pyramidal, sharp, the lateral superior ones a little shorter, 

 the superior middle one with two polished tubercles in the middle of 

 the side-border, perhaps a sexual character. Abdomen beneath hol- 

 lowed out, but shallow ; edges of segments sharplj^ defined. 



This larva is extremely interesting. The 2-jointed tarsi of hind legs 

 are exceptions in the whole family ; the general shape of body is more 

 like Libellulidoj. The antennae belong to Gomphus, and the mask also. 

 Stigmata behind prothorax free. The whole body finely granulatc>d. 

 The figure and the description arc taken from a dry specimen supposed 

 to be from Brazil (the locality not given), and to belong perhaps to 

 Zonophora. There has just arrived a collection from the middle Hima- 

 laya, Sutledge, sent by Rev. M. M. Carleton, containing several speci- 

 mens in alcohol, all agreeing perfectly with the described specimen. 

 It seems not impossible, indeed probable, that the species belongs to 

 the genus Idinus. 



CORDULEGASTER. 



Head transverse, oblong. Eyes conical, placed at anterior lateral 

 angles. Antennte seven articulated, filifomi. Between the antennae 

 the head forms a flat, semicircular projection. Mask extending a little 

 beyond the middle legs, spoon-shaped, covering the mouth, upper lip, 

 and front of head as far as the antenn:e. Palpi in general shape tri- 

 angular, much dilated forward, and furnished at outer edge with long 

 teeth of unequal length, slightly bent inward, and fitting closely in 

 an irregular line into those of opposite palpus ; movable hooks short, 

 sharp, slender. Prothorax nearly as broad as head. Stigmata large, 

 quite uncovered. Legs at base widely and equally separated ; formed 

 for running. Hind legs shorter than the body. Tarsi 3-jointed. Ab- 

 domen C3lindrical above, flattened below, tapering at end like a sphinx 

 pupa. Segments nearly equal in length, anal appendices rather long, 

 pyramidal, sharp. 



