69 



Mr. Colthrup exhibited a specimen of Enchelia jacobccce, in 

 which the red areas were unusually pale with a tendency to 

 xanthic coloration ; an unusually marked variety of Eurvhy- 

 para urticata, in which the spots on all the wings were 

 confluent, forming bands ; and small specimens of Pieris 

 rupee, including an example of the "yellow" form. 



Mr. Lucas exhibited living specimens of the immature 

 stage of Blatta anstralasice from Kew, and also a case con- 

 taining examples of all the species of the British cockroaches, 

 together with detailed drawings of several of them. 



Mr. Main exhibited living specimens of Blaita americana 

 from Silvertown, where it is very common, with cast skins 

 of the species. 



Mr. Edwards exhibited living specimens of Phyllodroniia 

 geriiianica, male, female, and immature. 



Mr. H. Moore exhibited the following cockroaches : 



Stilopyga orientalis and oothecae ; Periplaneta americana 

 (Florida) ; Periplaneta anstralasice (Kew) ; Phyllodrouiia ger- 

 iiianica (Cadiz and Corfu) ; Ectobia livida (Dorking) ; 

 Blabera gigantea (Brazil) ; Brachycola sexnotata (Brazil) ; 

 Derocalynima, sp. (Transvaal) ; Heteroganiia cegyptiaca 

 (Malta). 



Mr. Tutt exhibited a long and varied series of Epnnda 

 lutulenta, taken by Rev. E. Burroughs at Mucking, Essex, 

 in i8g8-g, and referred to the best-known forms, lilnebur- 

 gensis, tripuncta, sedi, and albidilinea, of Scottish and Irish 

 origin : the specimens exhibited did not show the intense black 

 ground colour peculiar to the named forms from west and 

 north, but were liberally sprinkled with grey scales. Yet 

 the variation was exactly on parallel lines with those forms. 



Mr. Lucas read a paper on " British Cockroaches — 

 Natives and Aliens," which was illustrated by numerous 

 lantern slides. 



Having first referred to the trivial names under which 

 cockroaches {Blattodea) are known in Britain, Mr. Lucas 

 stated that the typical cockroaches bear but little resem- 

 blance to any other group of insects, even in their own order 

 — Orthoptera, — the earwigs perhaps approaching them most 

 nearly. After the general appearance of a cockroach had 

 been noticed, the external anatomy and life-history were 

 treated somewhat fully, and well illustrated with lantern 

 slides. 



Before entering on an account of the recent British repre- 

 sentatives of the Blattodea, the history of the group in 

 Geologic ages was passed in review, especially as regards its 



