8o7ne Palaearctic species of Cordiilegaster. 287 



Oddly enough there is no trace of yellow markings on the 

 dorsum of 1st segment, although the segment is rather 

 lighter in colour than in No. I. This is a very beautiful 

 and interesting form. Dr. F. F. Laidlaw tells me that in 

 the collection of the Indian Museum there are two speci- 

 mens (^ and 9 labelled in de Selys' own handwriting, 

 " Cordidegaster nobilis," and dated " May '71, Shiraz," 

 Persia ; the ^ he states is indistinguishable from the (J 

 from Van as represented in my fig. 11, which I sent to 

 Dr. Laidlaw for inspection. No description of these appears 

 to have been published. 



The following characters may be mentioned — 



Prothorax : the posterior band is not completely interrupted in 

 the middle, although a narrow black wedge is partly driven into it ; 

 the lateral angles are yellow and the posterior and the interrupted 

 median line are practically confluent therewith. Yellow abdominal 

 bands much extended, the greater part of most of the segments 

 yellow ; for these, see fig. 1 1 ; these yellow markings are continued 

 more narrowly on the sides cephalad, and up to the 8th reach the 

 ventral suture in the (^ and nearly so in the $. 



Antenodals : (J, forewings, 14-15; hindwings, 11-12; $, f orewings 

 15-16; hindwings, 11-12. 



The following are approximate measurements — 



Locality ? 



Length of abdomen 



„ wing 

 Pterostigma, forewing 



,, iiindwing 



Vulvar lamina 



6 

 50 mm. 

 41'5 mm. 



3"5mm. 



3'75 mm. 



Amasia. 



Van. 



50-52 mm. 



41-5-43-5mm. 



3'5-4 mm. 



4-4*5 mm. 



9 



60 mm. 

 46-475 mm. 



4 mm. 

 4" 5-5 mm. 



8 mm. 



The males would therefore appear to be smaller than 

 those from Syria. 



The last species to be noticed is closely allied to C. biden- 

 tatus and insignis, but it has been treated as an independent 

 species. It differs from C. insignis in the condition of the 

 labrum, which has a distinct black median virgule. 



Cordulegaster coronatus, n. sp. 



(J. Frons yellow without black frontal marking ; nasus yellow with 

 two black points ; rhinarium black ; labrum yellow with very narrow 

 border black but becoming brownish on anterior margin, usually 



