262 [Noveruber, 



V. norvegica ; it was therefore interesting to me to see one of these females seize 

 and kill a large fly (the latter when examined was foxind to have had its thorax 

 bitten nearly throiigh); later on the same afternoon, my attention was directed 

 by a rasping sound to an old post, and on this I found another female engaged 

 in biting off the wood fibres in the manner adopted by an ordinary industrious 

 wasp. Smith, in his " British Museum Catalogue of Fossorial Hymenoptera, etc.," 

 (1858), p. 219, says that "this wasp was first discovered in 1836 .... building 

 nests in fir trees, etc.," which may mean that they were entering nests of 

 V. norvegica, and Dr. Perkins' experience of this association in Devon helps to 

 confirm this, whilst the observations recorded above seem to point to a possibility 

 that they may take a part in the construction of the nests, and also feed their 

 own larvae. The previous examples I have taken have been badly worn, which 

 would seem to show they must spend a good deal of time in the open. I find 

 this wasp easy to identify in the field both by its colour and more lethargic 

 flight.— H. M. Hallett. 



Breeding of Citnhex lutea. — Miss Doris E. Gardiner, of Girton College, has 

 recently given to the Cambridge Museum a $ Clmbex lutea, reared from the 

 larval stage, and has siipplied me with the following notes : " I found aboiit a 

 dozen of the larvae on Bottisham Fen, Julj' 15th, 1915. They were feeding on 

 willow, and were taken in their last skin. A few days later I found several 

 more on sallows at Quy I'en. I brought some home and tried to rear them, but 

 only two pupated: these two subsequently emerged this year [May, 1916]. 

 The larvae were night feeders, and appeared to thrive best when their food was 

 sprayed daily with water. The two which I reared myself I treated in this 

 way. When fv\ll-fed, they span cocoons between the leaves. If touched, the 

 larvae curled up in a ring, and sometimes drops of a white sticky fluid exuded 

 from little swellings in the skin. I have been regularly to Qviy and Bottisham 

 Fens for a number of years, and have carefully searched the willows and 

 sallows, but until last year I had never seen the sawfly-larvae." 



The ejection of liquid from the lateral pores is well-known (see Cameron, 

 Mon., iii, p. 15), On the other hand it is curious that Miss Gardiner should 

 have found moistening the food to be advantageous. For, as Mr. Morice tells 

 me, " Enslin, who is one of the most successful and experienced breeders of 

 sawflies, is emphatic in saying that wet is injurious to the larvae, and that 

 their food must never be damp." Cameron (I.e.) remarks that the larvae of 

 C. lutea are very difficult to rear. — Hugh Scott, University Museum of Zoology, 

 Cambridge : October 15th, 1916. 



Dolerus triplicatus Klug {Tcnthredinidae : Hymenoptera) in Epping Forest. — 

 On May 14th of the present year I captured nine males and eight females of 

 this interesting sawfly, which is usually considered a rarity. The insects were 

 to be found resting on the stems of the common Juncus effusus, the food-plant 

 of the species. 



Another series, consisting of a dozen of each sex, was captured in the same 

 place on May 23rd. The majority of the latter were taken in flight, only a 



