1*14.] 57 



interrupted, the anterior part of the marking being thus separated from 

 the transverse base. The marking is rather small and has its anterior 

 margin regularly rounded. 



Agrion ornatum, Selys. Along series of both sexes. The variation 

 of the males as regards the markings on the second and third abdominal 

 segments will be best understood by a reference to the diagrams on 

 Plate VIII. Fig. 3 may be considered as approximating to the type 

 and of course intermediates exist. A small Swiss series received from 

 Dr. Ris is fairly constant in the typical character of the markings, and 

 as far as he is aware nothing approaching the extreme variability shown 

 by the Van examples exists in Switzerland. At Van the species is 

 drawing near to the extreme south-eastern limit of its known distribu- 

 tion (Mesopotamia) . 



Agrion lunulatum, Charp. — A pair. The form of the middle lobe 

 of the posterior margin of the prothorax makes easy the determination 

 of this species. 



Agrion puella, Linne. — One $ of quite typical aspect but of 

 rather small size (h. w. 18 mm). 



iEsCHNICE CORDULEGASTERIN^E. 



Cordulegaster insignia, Schneider.- — 2 c?c?,2 ? 9 (one $ dated 

 5. VII). These seem to belong to the same species as that found at 

 Amasia, although they are more strikingly marked with yellow, very 

 pale on the thorax and 2nd and 3rd abdominal segments. The general 

 scheme of colour of the abdomen is very well represented in a figure of 

 a ? given in a paper by Bartenef on Odonata from the Caucasus- 

 Signakh and Telav district (Arb. Lab. Zool. Kab. Univ. Warsaw, 1912), 

 although in the unnamed Caucasian insect the proportion of black is 

 greater than in the examples from Van. As in Cordulegaster annulatus, 

 all the palaearctic species of the genus have probably the same tendency 

 to run into fairly well defined local races. C. insignis has occurred at 

 Comana in Roumania. 



JEsclvna serrata, Hagen. A single teneral ? not in very good 

 condition, and the name serrata is accordingly applied with a slight 

 hesitation. The specimen is of large size (h. w., exp. 50 mm.) and is 

 remarkable for the great development of the yellow lateral bands of the 

 thorax, the anterior band being prolonged caudad under the wing 

 base, and confluent with the rather large wedge-shaped marking on the 

 upper part of the middle field. This insect seems to come near JEsclina 

 osiliensis, recently fully described and figured by Mierzejewski (Bull. 



