BRITISH ORTHOPTERA. 171 



introduced from foreign countries, and are usually found in 

 dwellings, warehouses, &c. ; while the smaller species (Blatta) 

 occur in woods, under stones, amongst heath, rushes, &c. The 

 eggs are laid all at once enclosed in a capsule. 



Table of Genera. 



I. Species smaller Blatta. 



II. Species Largei'. 



1. AntennsB long Periplaneta. 



2. Antennee short .... Panchlora. 



1. Blatta, L., 1766. 



= Ectobia, Westw., 1840. 



These insects differ from Periplaneta and Panclilorci by their 

 smaller size ; they occur on herbage, beneath stones, under the 

 bark of trees, &c. ; several of the species may be caught bv 

 sweeping. 



I. Legs yellowish. 



1. Species larger. Two distinct dark marks on thorax - germanica. 



2. Species srcaller livida. 



II. Legs brown or blackish. 



1. Species larger. One distinct dark mark on thorax - lapponica, 



2. Species smaller. 



a. First joint of hind tarsi pale .... ericetorum. 

 B. Base only of first joint of hind tarsi pale - - 7iigri;pes. 



1. B. lapponica, L., 1745. = nigro-fusca, De Geer ; sylvestris, 

 Scop. ; hemiptera, Fab. — Figures of this species will be found in 

 Curtis's * British Entomology,' xii. 556 ; Donovan's ' British 

 Insects,' X. pi. 332 ; and Staveley's * British Insects,' pi. iv. 

 fig. 2. Very like B. ericetorum and nigripes, but larger, and 

 with a distinct, well-defined dark mark on the thorax. Occurs 

 in woods in the South of England from May to July. Bare. 



2. B. livida, Fab., 1793. = pallida, Oliv.— Comparatively 

 shorter and broader than the other species, with the disk of the 

 thorax scarcely, if at all, darker than the ground colour. Found 

 under the bark of trees and beneath stones in the South of 

 England during June and July. 



3. B. ericetorum, Wesm., 1838. =: germanica, Panz. ; panzeri, 

 Hag., Steph. — Strongly resembles B. nigripes, but easily dis- 

 tinguished by the colour of the first tarsal joint. Occurs among 

 heath, under stones, in woods, &c., near the coast, and is not 

 uncommon in the South of England from June to August. 



4. B. nigripes, St. = ericetorum, var. ?. — Bather larger and 

 of a more mottled appearance than B. ericetorum, of which 

 it is perhaps a variety. Occurs in woods during June. 



5. B. germanica, L., 1766. = asiatica, Pallas. — Figures of 

 this insect will be found in Donovan's ' British Insects,' x. 

 ,pl. 341 ; and in Kirby & Spence's ' Introduction to Entomology,' 

 l5th ed. i. pi. ii. fig. 3. Our largest species ; easily distinguished 



r2 



