ORTHOPTERA OF NEW ENGLAND. 471 



bindings of books bound in cloth. The use of Ryrethrum powder 

 on the shelves is the best remedy. It has been recommended to 

 mix a teaspoonful of powdered arsenic with a tablespoonful of 

 mashed potato, and scatter about their lurking-places ; but, when 

 poison is used, the greatest caution is necessary to prevent acci- 

 dents. 

 Borax is also said to be useful in destroying the croton bug. 



Blatta? flavocincta. Scudder. 



" Prothoracic shield rather dark brown, slightly paler along the 

 median line, bordered throughout with a pale yellowish band, 

 forming only a very narrow edge posteriorly ; broader in front, 

 and quite broad at the sides, covering all the deflexed border ; the 

 edge at the sides and front is slightly raised ; wing covers scarcely 

 reaching the tip of the abdomen, reddish brown, with the anterior 

 half of the outer margin paler, with a yellowish tinge ; wings not 

 half the length of the wing covers ; abdomen above very dark 

 brown ; below, dark brown, the terminal segment being darkest ; 

 legs yellowish brown, with spines as in B? lithophila; head reddish 

 brown ; sides below antennae yellowish ; eyes black ; antennae dark 

 brown, paler toward tip ; third joint rather larger than the two 

 succeeding joints, and equal in size to the second. Length of 

 body, fifty-six hundredths of an inch." 



Mr. Scudder placed this species and germanica under the genus 

 Ectobia, and it may not be i)roperly placed here. He also 

 described a species under Ectobia as lithophila (a manuscript name 

 of Harris) ; but he informs me that it is very likely to be the larva 

 of Platamodes pennsylvanica. 



Genus Periplaneta. Burmeister (1838). 

 Last abdominal sternum of the female divided ; sub-anal styles 

 of the male well developed. Antennae slim and tapering, longer 

 than the body. Legs long and very spiny. 



r Wine; covers and wings extending beyond tlie end of the 



J abdomen in both sexes ainericana. 



1 Wing covers and Avings not reacliing to the end of tlie 



"■ abdomen in tlie males, rudimentary in the females. . onentalis. 



Periplaneta Americana. Fabricius. 

 Length, one inch and one-fourth. Color, reddish brown, with 

 paler indistinct bands on the pronotum. AVings and wing covers 

 well developed in both sexes, and extending beyond the end of 

 the abdomen. Legs much lighter in color than the body. 



