OKTIIOrTEHA OF NOVA SCOTIA. — PIEHS. 247 



Key to Subfamilies of BlattjDjE. 

 a. Last ventral segment of female abdomen plane, without a r'u\p.c and 

 midivided; fore femora rarely armed beneath on inner margin with 

 many spines; when so armed, the subgenital styles unequal or wanting. 



PsKUDOMOPINiE, p. 247. 



aa. Last ventral segment of female compressed so as to fonn a ridge on its 

 under side, and divided so as to be bivalved; fore femora armed beneath 

 on inner margin with many spines BLAxxiNyE, p. 249. 



Subfamily Pseudomopinae (Cockroaches, in part). 



(BlatteAlince of former Writers.) 

 So far only a single representative of a single genus, 

 Blattella, and that an introduced species, has been found in 

 Nova Scotia. Another large North American species, Isch- 

 noptera pennsylvanica (De Geer), the female of which is 

 believed to be what has been called Phyllodromia borealis 

 (Saussure), has been reported under the latter name from 

 Maine and Massachusetts, and under the former name from 

 Ontario, and possibly, but not at all likely, may occur here. 

 The males and females of this species are so unlike that 

 many have considered them to be separate species. 

 1. Blattella germanica (Linnaeus). Croton Bug; Ger- 

 man Cockroach; "Yankee Settler" (local name 

 in Nova Scotia). 

 Phyllodromia germanica. Piers, Trans. N. S. Inst. Sc, 

 ix, 209 (1896); Halifax. 



Description. — Size small; body rather long, sides slightly narrowing in 

 male and almost parallel in female; wing-covers fully developed in both 

 sexes, membranous or somewhat leathery, as long or longer than abdomen in 

 both male and female; subanal plate of male with styles rudimentary or 

 wanting. 



Colour. — Yellowish-brown, females often darker; legs lighter; pronotum 

 with two dark brown longitudinal stripes separated by one of yellowish. 



Measurements. — Male: body, 13 mm.; width of body, 4 mm.; antenna;, 

 14 mm.; wing-covers, 9-10 mm. Female: body, 10 mm.; antenme, 13 mm.; 

 wing-covers, 11 mm. 



Range. — ^Native of Europe; introduced into America where it has spread 

 abundantly almost everywhere, especially in dwellings in towns, although 

 seldom found in numbers in country districts. It made its appearance in 

 New York in numbers about 1842 when the Croton aqueduct was completed, 

 and hence is often called the Croton Bug. 



Occurrence in Nova Scotia. — When this troublesome 

 insect first appeared in Nova Scotia, there is no data to show, 

 as it was not reported from here by scientific writers until 



