tbe cases. The case of solitarieJJa is whitish grey, the under-side darl^er, 

 the mouth a little bent ; while that of olivaceella on the underside is 

 almost dark brown, above somewhat lighter, the mouth much more bent ; 

 consequently there is an essential difference, not to be mistaken. Fur- 

 ther, a glance at 20 or 30 examples set in rows, and placed close tq^- 

 gether, will show unequivocal distinctive characters ; glancing obliquely 

 over the moths in daylight it will be seen that the fore- wings in oliva- 

 ceella are olive coloured, glistening with metallic lustre, but in solitariella 

 they are dull luteous : and thus the doubts of sceptics will vanish. 



REMINISCENCES OF AN ENTOMOLOGICAL EXCURSION TIP THE 

 DEMERARA RIVER. 



BT BERNARD PIFFARD. 



A FEW years ago, having a desire to see what the country around Deme- 

 rara would produce in the way of insects, I equipped myself for a tour 

 in those parts and started for George Town, at which place I arrived 

 late in March. Before proceeding into the interior, I collected for a 

 few weeks in the immediate neighbourhood of the town; in fine weather 

 the sport was good, and even when wet there was no occasion to abandon 

 it, for the houses literally swarmed with various species of ants, one of 

 which particularly attracted my attention on account of the extreme 

 celerity of its movements. This interesting little insect darted about 

 upon the floors with such inconceivable speed, that during its progress 

 it was impossible for the eye to follow it, being visible only at the 

 moment of preparing for each spring, the length of which averaged six 

 or seven inches. 



Many species of Lepidoptera abounded on the grassy banks of 

 roads, canals, &c., and these were to be seen on the wing chiefly from 

 sunrise till noon, generally re-appearing late in the afternoon. Among 

 these I may mention the active Pamphila bucephala, as well as other 

 skippers which settled upon the short grass ; the strong-flighted Anartia 

 JatrophcB, which was tolerably abundant ; Callidryas Euhule, a species 

 interesting from the great dissimilarity of its sexes; and on one occasion, 

 in the evening, I captured a Thecla, remarkable for the beauty of its 

 under-surface, which was of a lovely pale metallic green, fringed with 

 chocolate coloured markings, and traversed by a silvery band: whilst on 

 the opposite bank of the river, in like situations, I met with Junonia 

 Lavinia. I frequently visited some half-drained land skirting the town ; 

 this, though teeming with insect life, was not altogether the locality 



