206 TRANSACTIONS, NATURAL HISTORY SOCIETY OP GLASGOW. 



What is perhaps the same gall forms a roundish 

 projection about 1 mm. in diameter, but on the upper 

 side of the leaf scarcely measuring so miuch; and 

 it differs also from the other gall in being densely 

 covered with white longish woolly hair. These two 

 galls are only found on the upper side of the leaf, 

 and do not project or are visible at all on the 

 lower; but there is a third gall which takes the 

 form of a small projecting pustule on the lower 

 side, appearing also on the upper but not projecting 

 there much above the surface. On the lower side 

 it is covered with hair, and is white above and 

 beneath. In Cheshire I find these galls are common, 

 if local. 



Phytopus-galls on Artemisia campestris, L., and 

 A, pontica, L., have been described from Austria 

 by Dr. F. Low, cf. Verh. z.-h. Ges. Wien, 1879, p. 

 716 ; and in the same publication (1878, p. 132, pi. ii. 

 f. 5) he describes and figures mite-galls which are 

 no doubt identical with those I have found. Low's 

 specimens were found by Mayr near Vienna, and 

 have not, so far as I know, been recorded from any 

 other locality on the Continent. The second and 

 third of my galls Low has not seen. 



3. On Seclum Rhodiola (Rhodiola rosea, L.). — On the 

 Scuir of Eigg I found abundantly, and on all parts 

 of the plant, the mite-galls described by F. Low in 

 Verh. der K.K., z.-h. Ges. Wien, 1881, p. 5. They are 

 irregular fleshy swellings of from 1-3 mm. in length, 

 mostly yellowish-green, but not unfrequently of a 

 reddish hue, and have in the centre an irregularly 

 sided cavity in which the mites live. Their form is 

 very irregular ; the surface is also rough and irregular; 

 and no j)art of the plant escapes them. Low's speci- 

 mens were from Lower Austria, and I am not aware 

 that they have been recorded from any other locality. 



II. ON GALLS OF CECIDOMYIJS. 



1. Lasioptera juniperina. — On the Scuir of Eigg I 

 found galls of this species on Juniperus nana, not in 



