PSYCHE. 



ORGAN OF THE CAMBRIDGE ENTOMOLOGICAL CLUI 

 EDITED BY B. PICKMAN MANN. 



Vol. I.] Cambridge, Mass., June, 1876. [No. 26. 



Synoptical Tables for determining N. A. Insects. 

 Orthoptera. 



1 (8) Head sometimes vertical, sometimes nearly horizontal. Hind fe- 

 mora resembling those of the other legs, and scarcely, if at all, stouter 

 or longer than the middle pair. [Non-saltatorial.] 



2 (3) Head subhorizontal, mouth anterior; tarsi S-jointed or less; anal 



area of wings extending around the apex over more than half the 

 front border of the wing; abdomen terminated by forcipate ap- 

 pendages Forficulariae. 



3 (2) Head and mouth variable; tarsi 5-jointed 1 ; anal area of wings 



never infringing on the front border ; abdominal appendages not 

 forcipate. 



4 (5) Body oval, depressed ; head nearly horizontal and wholly or 



almost wholly withdrawn beneath the pronotum; mouth parts 

 posterior; ocelli generally two in number; antennas long, seta- 

 ceous; pronotum shield-like Blattariae. 



5 (4) Body elongate, generally narrow: even when depressed or ex- 



panded, generally but little broader than deep at the posterior 

 extremity of the prothorax ; head free, often separated from pro- 

 thorax by a deep constriction. 



6 (7) Head oblique, trigonal; mouth inferior, and more or less 



posterior; antennae seldom so long as the body, slender, seta- 

 ceous 2 ; ocelli three ; pronotum longer than any other segment ; 

 fore legs raptorial, terminating in a single claw, which with 

 the tarsi is placed beneath the spinous tibia when at rest; anal 

 cerci articulated Mantides. 



7 (6) Head subhorizontal, generally rpiadrate or gibbous; mouth 



anterior and inferior ; antennae generally longer than the body, 

 setaceous, moderately stout; ocelli three, but often wanting; 

 pronotum very short; fore legs constructed like the others, the 

 fore femora often arcuate at the base; anal cerci inarticu- 

 late Phasmida. 



i Occasionally a joint is absent, probably by an accidental loss of the leg in early 

 life; since in the reproduction of lost limb — a ] phenomenon not unusual in the lower 

 Orthoptera — one tarsal joint always disapp* 



2 Pectinate in some male 



