1805.] ^ 105 



5. — Idiocerus fremulce, Estlund. 



riavo-testaceus, supra albidus, abdomine nigrieante ; verticis, 

 pronoti, scutellique maculis nigro-brunneis ; hemelytris albido-hyalinis, 

 fasciis duabus aureo-briinneis. Clava antennarum in (^ nulla. 



Long. 21 lin. 



Cicada tremulce, Estlund, Hand!., 1796, p. 129, tab. 5, fig. 3. 

 lassus tremulce, Zett., Ins. Lapp., p. 302-3. 



Rather smaller than any of the preceding, and easUy distinguished 

 by the two brown transverse fasciae of the hemelytra. I have never 

 met with it ; but specimens are in Mr. Douglas' collection, 



(To he continued.) /t.^ 



NOTE ON THE LAKVA OF LAVEBNA SUB-BISTBIGELLA. 

 BY H. T. STAINTON, F.L.S. 



Since the history of the larva of Laverna decorella was worked out 

 by the successive investigations of my friends Senator von Heyden, of 

 Frankfort, and Mr. C. Gr. Barrett, of Haslemere, the larva of Laverna 

 suh-listrigella must have felt its day would soon come, and its place of 

 concealment be pointed out to the public. 



On the 4th of June last, Mr. Barrett, who had already been trying 

 to worm out its secrets, wrote to me as follows : — " I feel puzzled about 

 Laverna sub-histrigella. To judge by the abdomen of the imago, the 

 larva must be an internal feeder, and it certainly frequents the same 

 places as decorella. I cannot find any signs, <^f larvae feeding in the 

 roots of these small species of Epilohium, otherwise I should think they 

 belonged to this species. However, I think it leaves its hybernaculum 

 (and probably lays its eggs) later than decorella.''^ 



On the 30th of June, to my no little surprise, I received from my 

 valued correspondent at Wiesbaden, Dr. Eossler, larvse of the long- 

 sought Laverna sub-histrigella. Concerning these larvae Dr. Rossler 

 wrote as follows : — " I have now the pleasure of sending you some 

 larvae of Laverna sub-bistrigella, Haw. They live in the pods of LJpilo- 

 bium montanum, &c., and eat them from the tip downwards, without 

 there being any external mark of their presence. I suspect, therefore, 

 that they must penetrate through the base of the flower. The meta- 

 morphosis takes place on the earth." 



