THE DISTRIBUTION OF WOODLICE IN SCOTLAND 273 



A perusal of the Census here given shows that Scottish 

 workers have a considerable amount of work to do before 

 we possess a full knowledge of the distribution of the 

 Woodlice. 



So far twenty-two species have been recorded out of a 

 possible thirty, but apart from the counties of Haddington, 

 Edinburgh, Fife, Dumbarton, Inverness, and Argyle, the 

 number of species recorded is exceedingly small, including, 

 with one or two exceptions, only the very commonest ones. 

 Such species as Trichoniscus pusillus (from eight counties), 

 T. pygmceus (from one), Hapl. mengii (from three), H. 

 danicns (from two), PJiiloscia muscorum (from five), Cylisticus 

 convexus (from four), Porcellio dilatatus (from two), P. Icevis 

 (from one), Porcellionid.es pminosus (from five), Platyarthrus 

 lioffmannseggii (from three), Armadillidium vulgare (from 

 five), and A. nasatum (from one), may be expected to occur 

 in practically every county. 



A single record for each of these species means an 

 addition of 237 localities, but at least five or six are desirable 

 for each county. Before we can consider the distribution 

 worked out to the same degree as has been done by English 

 and Irish naturalists for their respective countries, upwards 

 of 2500 records must be made. 



It will thus be seen that there is a wide and interesting 

 field awaiting investigation, and with the cessation of the 

 present European hostilities, I look forward with some 

 confidence to Scottish naturalists to assist in filling up the 

 gaps in our knowledge of the distribution of these interesting 

 animals. 



An October Swift at Glasgow. This autumn some half- 

 dozen Swifts on 24th August were the last of the main body 

 noticed at Muirend, where a straggler was again observed on 

 9th and 10th and two on nth September. Walking through 

 Newlands, in the same neighbourhood, on the afternoon of 

 13th October, one of my boys drew my attention to a Swift, which 

 was wheeling about overhead as if it had mistaken the season by 

 a couple of months. I am not aware of any previous record of the 

 occurrence of the Swift in "Clyde" in October. John Robertson. 



