•J 4 [February. 



which swarmed in the htng herba},'e along the river bank. One of 

 the first seen was Ophiogomphus serpcntinus, the most beautiful of the 

 European Gomphids, and quite different I'rom the others on account 

 of its exquisite green coloration. The species was not at all frequent, 

 and it was the most wary, only one being secured by Dr. liis. Ony- 

 chogomphus forcipaius was not quite so rare, and a few good males 

 were caught, while Gomphus vulffafissimus, quite unexpectedly, put in 

 an appearance. One or two Platetrum depressum were noticed at a 

 small lateral stream. But Somatoelilora Jlavomaculata outnumbered 

 all the other larger dragon-flies ; every corner along the margins of 

 the wood, and almost every small clump of bushes gave shelter to a ^J 

 which was not as a rule difficult of capture. One of the striking 

 features of the Glatt marshes was Papilio machaon, which was flyiug 

 about in splendid examples of the second brood. 



Our last excursion in the low country was to the Hauser See a 

 pretty lake near Oasingen (about 1360 feet s. ui.), and distant from 

 Eheinau about 5^ miles. The walk was sufficiently long in the 

 intense heat. When we were still some distance from the lake, a few 

 Orthetrmn hrunneum appeared flying over the road. Entering the 

 shaded paths in the woods surrounding the lake, we found them alive 

 with Limenitis sybilla. I have never seen it before in such numbers, 

 but they were nearly all much worn and we had no time to spare to 

 select them. So we left them alone, as we also did Apatura iris, 

 which once or twice tempted us to linger, and we very soon reached 

 the lake. This is one of the localities where the great prize Epifheca 

 biviaculata is to be found, but we were of course too late for it. 

 Amongst the first species seen were SoinatocJdora metalUca flying 

 along the margin, and a little farther on one or two Libellula fulva, 

 together with a ^ Sympetrum sanguineum. But we hastened on to 

 the corner for Leucorrhinia, only to find that in this early season we 

 were too late. L. albifrons was still present and a few pairs were 

 taken, but of L. pecloralis only one ^ was seen and taken by 

 Dr. Ris, who handed it over to me with his usual generosity, which 

 extended to everything of any value that was found. L. caudalis, 

 which also occurs here, was evidently quite over. The usual com- 

 plement of small dragon-flies was obtained, including Pyrrhosoma 

 tenellum, and on going round to the other side of the lake we found 

 Oomphus pulchellus common, but worn. Orthetrum cancellatum was 

 again present, but 1 found this species one of the most difficult of all 

 to catch. Leaving the lake proper, a little marshy meadow was 

 visited for Lestes dryas, of which we got a few, and the same locality 



