654 



Deutsch. Ent. Zeitschr. 1909. 



Description of the nymph of Agrion armatum Cliarp. 

 (Pseudoneur.) 



By Esben Petersen, Silkeborg. 



One of the most rare Agrionids here in Denmark and else- 

 where in Europe is Agrion armatum Charp. It occurs locally, 

 and it is very interesting that we in this country have found 

 the species in three different localities : a moor near Söborg 

 (C. Lund), Dannerhöj in Vendsyssel (A. C. Thomsen) and a small 

 pond in the vicinity of Silkeborg. The species is on the wing 

 very early. I have seen matured specimens from Dannerhöj 

 May 12**^. In this spring I collected some larvae from the above 



mentioned pond, and I suc- 

 ceeded in breeding the 

 species. 



As the nymph is un- 

 known I give a short de- 

 scription of it : 



Antennae brown, lighter 

 towards the apex. The eyes 

 greyish green. Prothorax 

 dorsally with a small longi- 

 tudinal , yellowish median 

 line. Head and thorax 

 light brown, punctared with 

 darker dots. Abdomen dor- 

 sally brown with a small 

 yellowish longitudinal me- 

 dian line and with lighter 

 margins. Each segment , with exception of the two last , with 

 small and shortly oblong , yellowish stripes at the bind margin 

 (6 — 8 dorsally and the same number ventrally). Abdomen below 

 lighter than above and everywhere punctured as the head and 

 thorax. The cases of wings greyish brown without spots. Legs 

 light brown. Lenght of body 16 — 17 mm, of lamellae 6 mm and 

 of cases of wings 5,5 mm. 



I 



One of the lamellae and the mask, 

 seen from above. 



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