Some Palaearctic species of Cordulegaster. 285 



2nd. The upper lip (labrum) finely bordered with blackish even in 

 front (with the median virgule more slender). 



3rd. The occiput and back of the eyes (see the male). 



4th. Thorax (see the male). 



5th. Abdomen (see the male). 



6th. The base of the vulvar laminae dark brown (in annulatus they 

 are marked each with a yellow spot). 



The wings are a little broader, pterostigma shorter, the costa more 

 finely yellowish externally. 18 antenodals in forewings; 13-14 in 

 hindwings. 



Compared with bidentatns, insignis differs from it : the cj by the 

 labrum less bordered with black, the median virgule obliterated, the 

 front less excavated, without anterior line ; the occiput yellow, 

 globular ; the two yellow bands on the front of the thorax broader ; 

 the broad yellow bands of the abdomen; the inferior teeth of the 

 appendages a little stronger; the costa more yellowish externally. 

 The $ is distinguished by the labrum much less bordered with black ; 

 the median virgule smaller; the front less excavated with anterior 

 line very slender and short ; its base in front of the ocelli less blackish, 

 the occiput yellow, globular ; the two bands in the front of the thorax 

 broader ; the yellow rings of the abdomen broad ; the costa yellow 

 externally. 



Described from two males and two females from Syria 

 and a $ from Kellemisch, Asia Minor (Mon. des Gomphines, 

 pp. 603-4). 



The following observations are based on material in my 

 own collection. Nearly all the specimens have been slightly 

 altered by pressure, and I am unable to confirm with 

 absolute certainty the above statement that the abdomen 

 is less thickened than in annulatus, but it is probably 

 correct. Otherwise the specimens are nearly all in very 

 good condition. 



I. A (^ from Asia Minor without more definite locality 

 agrees fairly well with the above description. It may be 

 from the Taurus Mountains whence Prof. Manissadjian 

 (from whom the whole material of this species was received) 



