52 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



ORTHOPTERA. 



Key to Sub-orders. 



Legs nearly equal in size. Hind femora not enlarged for 

 leaping. Sound-producing organs absent. Ovipositor 

 concealed NON-SALTATORIA p. 52 



Legs unequal in size. Hind femora enlarged and thickened 

 for leaping, generally much longer than the middle 

 femora. ^ Sound-producing organs usually present. 

 Ovipositor usually plainly visible SALTATORIA p. 62 



NON-SALTATORIA. 



The insects of this sub-order have the legs fitted for running 

 rather than for leaping. There are three families (not including 

 F orficulidce) in this group in the United States, all of which are 

 represented in Connecticut,* and may be distinguished by the 

 following key : 



Key to Families. 



1. Body short, broad, oval, and strongly flattened. Head 



nearly concealed by pronotum. Ocelli two. Pro- 

 notum shield-shaped, transverse. Legs compressed 



BLATTID^ p. 52 

 Body elongate, narrow. Head free, not covered by 

 pronotum which is much longer than broad. Ocelli 

 three or wanting. Legs slender, not compressed. ... 2 



2. Head oblique, mouth inferior. Ocelli three. Pronotum 



generally longer than any other segment. Front pair 



of legs fitted for grasping. Cerci jointed 



MANTID^ p. 59 

 Head sub-horizontal, mouth-parts nearly inferior. 

 Ocelli often wanting. Pronotum very short. Front 

 pair of legs not fitted for grasping. Cerci not 

 jointed PHASMID^ p. 61 



BLATTID^. 



This family includes the insects known as cockroaches. The 

 body is oval and much flattened, head nearly horizontal, almost 

 covered by the broad pronotum, and bent under so that the 

 mouth-parts project back between the front pair of legs. The 



'The family Mantidie is represented \\\ Connecticut only by introduced species. 



