



PSYCHE. 



ORGAN OF THE CAMBRIDGE ENTOMOLOGICAL CLUB 

 EDITED BY B. PICKMAN MANN. 



Vol. I.] Cambridge, Mass., July, 1876. [No. 27. 



Synoptical Tables for determining N. A. Insects. 

 Orthoptera — U. S. Forficulariae. 1 



1 (6) Sixth antennal joint much shorter than the first. 

 2 (5) First antennal joint as long as the fourth to sixth joints inclusive. 



3 (4) Furnished with both tegmina and wings . 1. Labidura riparia. 



4 (3) Possessed of neither tegmina nor wings. 2. Anisolabis maritima. 

 5 (2) First antennal joint no longer than the fourth and fifth joints 



together 3. Spoiigophom brunneipennis. 



6 (1) Sixth antennal joint as long, or very nearly as long as the first. 

 7 (18) Sixth antennal joint cylindrical, many times longer than broad ; 

 'second tarsal joint produced beneath the third. 



8 (9) Wings wanting, or shorter than the tegmina. 



4. Forficula aculeata. 



9 (8) Wings protruding beyond the tips of the tegmina. 



10 (13) Middle legs very much nearer the fore than the hind legs. 



11 (12) Male forceps attingent at extreme base. 



5. Forficula auricularia. 



12 (11) Male forceps widely separate at extreme base. 



6. Forficula taeniata^ 

 13 (10) Middle legs only a little nearer the fore than the hind legs. 



14 (15) Inner edge of male forceps with a post-median tooth. 



7. Forficula exilis. 



15 (14) Inner edge of male forceps with no distinct post-median 



tooth. 



16 (17) Inner edge of male forceps sharply and profusely 



denticulate 8. Forficula californica. 



17 (16) Inner edge of male forceps with, a single sharp basal 



tooth 9. Forficula pulchella. 



18 (7) Sixth antennal joint plainly obconic; second tarsal joint simple, 

 compressed. 



1 A synopsis of all the N. A. species has just appeared in the Boll. U. S. Geol. and 

 Geogr. Serv. Terr., vol. ii. [See Bibl. Rec., No. 571.] 



