284 Mr. Kenneth J. Morton on 



The following three forms are referred to C. insignis, 

 Schneider, provisionally, although they differ from one 

 another very considerably in appearance. Further material 

 from other parts of Asia Minor is much to be desired, and 

 also examples from the European side. C. insignis has been 

 recorded from Eoumania, but in what form it exists there 

 I do not know. 



Cordulegaster insignis, Schneider. 

 Differs from the meridional form of annulatvs. 



(J. 1st. The front hardly excavated, always yellow without a black 

 line ; that of the base before the ocelli almost absent. 



2nd. Labrum very lightly margined with bro^^^l in front without 

 coloured median virgule. 



3rd. The occiput is yellow swollen in front and behind as in 

 annulatus, but surmounted by a crest of shorter yellow hairs. The 

 lower whitish-yellow part behind the eyes larger. 



4th. The yellow line between the large lateral bands on the thorax 

 reduced to a fine superior line more or less interrupted (as in hiden- 

 tatus). The two yellow bands on the front of the tliorax are a little 

 broader inwards. 



5th. The abdomen is less thickened before the extremitj-. The 

 yellow rings of the 3rd, 4th and 5th segments broader, occupying 

 nearly their median half ; on the 6th and 7th the yellow ring has the 

 same dimensions as in the preceding, but it is forked behind on the 

 dorsum, and constricted upon the sides also behind, so tliat it ends 

 in two little yellow points ; on the 8th the ring is regular, not con- 

 stricted upon the sides, straight behind, nearer the base than the 

 posterior end ; on the 9th and 10th the lateral yellow spots (one or 

 two on 9th ; one on 10th) are larger and better marked. 



6th. The appendages are almost of the form of those of bidentatus, 

 the superior being separated from their base and provided beneath 

 with two teeth. They are black, brown at the tips ; the inferior is 

 as long as broad. 



The wings are as in bidentatus, the pterostigma being shorter than 

 in annulatus, and the large space near the membranule of the hind- 

 wings divided into 3 cellules only. 15-18 antenodals in forewings, 

 13 in hindwings. Costa outwardly strongly margined with 

 yellow. 



9. Differs from that of annulatus as follows — 



1st. The black line on the summit of the front is very fine and very 

 short ; the front less excavated, the black basal line before the ocelli 

 almost absent. 



