100 BRITISH ORTHOPTERA. 



Evans"* speaks of it as- -" Common in kitchens, bakehouses, etc. 

 in most towns. I have found it occasionally even in isolated 

 farmhouses, and Mr. R. Godfrey tells me cockroaches, no doubt 

 of this species, are common in coal-pits about Bo'ness. I also 

 heard of their presence in a coal-pit near Dalkeith a number 

 of years ago." It is reported from Paisley (A. M. Stewart], 

 and as abundant in houses, etc., in the Ellangowan district of 

 Dumfries (B. McGowan). In Ireland it has occurred in 

 Dublin, Donegal, and Armagh (fide S. W. Kemp), etc. 

 Probably B. orientalis is dominant over B. germanica and 

 P. americana, although it has been thought that B. germanica 

 is displacing it in Vienna. In Kew Gardens it seems to be 

 less common than P. austro2asise. 



Genus 4. PERIPLANETA Burm. 



Periplaneta BURMEISTER Handb. Eiit. vol. ii, p. 502 . . . 1838. 

 Cacerlaca SAUSSURE Mem. Hist. Nat. Mexique. Blatt.,p. 71 . 1864. 

 Blatta auctorum. 



Sexes very similar ; antennas slender, longer than 

 the body. Pronotum with margins convex, lateral 

 ones deflexed and approaching anteriorly, so that the 

 front margin is narrow, pronotnm not covering the 

 back of the head, widest beyond the middle. Elytra 

 .and wings usually extending considerably beyond the 

 tip of the abdomen. Legs strongly spined, spines on 

 tibiae arranged in three rows ; basal segment of hind 

 tarsi as long as, or longer than, the remaining 

 segments together; the whole tarsus spined "beneath; 

 pulvilli very small. Cerci and styles long. Type of 

 the genus Periplaneta americana Linn. 



TABLE or SPECIES. 



1. Elytrn unicolorous ; pronotum bright brown, 



clouded ; cerci of male long, curved after 



death, rather light in colour . . . americana. 



2. Elytra with a yellow streak in the mediastinal 



area ; pronotum dark with a yellow border ; 



cerci straight, darker .... australasise. 



* 'Ann. Scott. Nat. Hist.' Jan. 1901. 



