250 AN INTRODUCTION TO ENTOMOLOGY 



guests, and destroy them when they can; but the crickets are very 

 agile. These are the smallest of the true Orthoptera. 



This subfamily includes a single genus, Myrmecophila, of which 

 five species have been described from the United States. Only one 

 species has been found in the East; this is Myrmecophila pergdndei. 

 In this species the length of the body is 3-5 mm. 



Subfamily MOGOPLISTIN.E 



The Wingless Bush-Crickets 



These crickets are found chiefly on bushes or among rubbish under 

 bushes; some are found beneath debris in sandy places. They are 



small; those found in the 



United States measure from 



5 mm. to 13 mm. in length of 



body. They are either wing- 

 less or furnished in the male 



sex with short tegmina, in 



which the stridulating organs 



are well developed. The body 



is covered with translucent, 



easily abraded scales. 



Most of the species are 



tropical or subtropical in dis- 

 tribution; our species are 



found chiefly in the South and 



Fig. 2j2.^Cryptopti- Southwest; but the range of 



him trigonipalpiim. one of them extends north to Fig- 273. — Holosphy- 



(From Rehn and Long Island. Only four spe- rum boreale {From 



Hebard. ^:^^u^,.^u ^^r,L:u^A ^'^ Rehn and He- 



cies have been described from 



bard.) 



the East and one of these is 

 restricted to Florida. A few others are known from the western part 

 of our countr>\ A monograph of the North American species was 

 published by Rehn and Hebard ('12). 



Figure 272 represents the male of Cryptoptilum trigonipdlpum, sl 

 wingless species found from Virginia southward; and Figure 273, the 

 male of Holosphyrum boreale, found in the Southwest. 



Subfamily GRYLLOTALPIN^ 



The Mole-Crickets 



The mole-crickets differ greatly in appearance from the more 

 typical crickets, the form of the body and of the fore legs being 

 adapted to burrowing in the ground. The front tibiae, especially, 

 are fitted for digging; they are greatly broadened and shaped some- 



