130 Eleanor A. Ormcrod's observations,' ^^c. 



appear to be of the Andricus glandiuni of GIraud ; but at 

 present, from this singvilar duration of the larval condition 

 (which is mentioned by Dr. Gustav Mayr in the case 

 of his own larval specimens), we have not secured the 

 imago as an English species. 



I also found a scale insect of Aspidiotus conchiforniis 

 on apjDle bark, with its large eggs apparently perfectly 

 iminjured ; a very few specimens of Tlirips, alive and 

 uninjured; and also specimens of a few other insects in 

 various stages, but not in sufficient numbers to be note- 

 w^orthy. The Acari appeared to be even less susceptible 

 to cold than the insect larvfe. 



On the 24th of January (when the highest temperatures 

 had been below thirty-two degrees for some days and the 

 minima at night ranging between eighteen and twenty- 

 seven degrees), I found two species of the bark mite 

 apparently uninjured, the larger ones in very great num- 

 bers, and rousing into activity on being brought into the 

 warm room, and the smaller also perfectly recovering. I 

 am not able to differentiate the species with certainty, but 

 they were fully-developed specimens ; in the one case 

 with the single claw characteristic of the common Acarus 

 geniculatus, and in the other with the claw trifid and 

 heterodactylous. 



I also found enormous quantities of the Calycopldhora 

 avellance. of Amerling (the Plvytoptus of the filbert and 

 hazel bud-galls), on the 2nd and 3rd of February, in per- 

 fect health, inside the diseased bud growths, and in such 

 great numbers that the masses might even be detected by 

 the naked eye, and amongst them 1 was fortunate enough to 

 find a good specimen of the ^^^ mth the young Phytoptus^ 

 showing well under a high power, through the transparent 

 pellicle. I much regretted not being able to find more 

 kinds of insects for examination, but (in all I saw) the 

 effects of the cold appeared to pass away on the insect (in 

 whatever stage) being thawed, leaving it, as far as appeared, 

 in its ordinary condition. 



