BY PLANTS AND VEGETABLES 463 



introduced, which reproduce on a small and limited scale 

 the minute life of warmer lands. 



In these exotic colonies surprising variety 'of life is 

 represented. Of Spiders, Tkeridion tepidariorum is now 

 very common injnost large greenhouses, where it is to be 

 found in all stages of development at all times of the year, 

 and Hasarius adansonii has occasionally occurred in the 

 warmer glasshouses. Insects of many orders are numerous: 

 Ants from the tropics, such as Tetramorium guineense, and 

 Technomyrmexalbipes, an inhabitant of India and the islands 

 of the Pacific, have been found in the Royal Botanic Garden 

 in Edinburgh. A common Indian Ant, Triglyphothrix 

 striatidens, which has been imported to the United States 

 on tropical plants, has recently been reported to be spreading 

 there. Beetles have come to us in orchid bulbs wherein 

 the grubs tunnel and feed : Dr R. S. MacDougall has 

 found a species of Xyleborus attacking Dendrobium in an 

 orchid house at Pitlochry, Perthshire ; he has also obtained 

 a Beetle, native of the Straits Settlements, Baridium ater- 

 rimus, in orchid bulbs from Penang, and has collected 

 several specimens of a Burmese Longicorn Beetle Diaxenes 

 dendrobii, from orchids growing in Midlothian. This Indian 

 immigrant has of late been found in a number of orchid 

 houses in England and Scotland. 



A tiny species of Thrips, Euthrips orchidaceus, has 

 recently been found on hothouse orchids in the Royal 

 Botanic Garden, Edinburgh, and in the Glasgow Botanic 

 Garden ; and it is more than likely that the Springtail, 

 Smintliurus igniceps, which is confined to greenhouses, 

 ranging from Edinburgh and Glasgow, to Germany, Norway, 

 and Sweden, is a foreigner by ancestry. 



In another connection, I have mentioned that Cock- 

 roaches from America (Periplaneta americand] and from 

 Australasia (P. australasiae) flourish in many Scottish 

 greenhouses ; and isolated examples of other foreign Cock- 

 roaches are occasionally captured, such as the specimens of 

 "probably Lucophaea surinamensis and Blabera gigantea" 

 which, Prof. ]. }. F. X. King reports, paid an unexpected 

 visit to the Broomielaw in Glasgow a few years ago. Even 

 more recently two species of Japanese Grasshoppers, Die 

 strammena marmorata and J^ackycines asynamorus, the 



