EXPLANATION OF PLATES. 



Except when stated otherwise, the specimens figured are in 

 the collection of the Academy of Natural Sciences, and were 

 drawn by Miss Helen "Winchester. 



FIGURE PAGE 



PLATE 1. Gastrocopta. 



I. Gastrocopta armifera Say. Type specimen 15 



2-4. Gastrocopta armifera Say. Germantown, Philadel- 

 phia. 73876 15 



5. Gastrocopta a. affinis St. Evansville, Wis. 98273 . . 18 



7. Gastrocopta a. similis St. Rose Hill, Ont. 98272 ... 17 



7-9. Gastrocopta a. clappi St. Knoxville, Term. 98279 . . 20 



10. Gastrocopta a. ruidosensis Ckll. Ruidoso, N. M. 73944. 19 



II. Gastrocopta a. ruidosensis Ckll. Gallinas On., N. M. 



84465 19 



PLATE 2. Gastrocopta. 



1, 3. Gastrocopta armifera abbreviata St. Eastport, Iowa. 



98270 18 



2. Gastrocopta a. abbreviata St. Shawnee Co., Ks. 11639. 18 

 4-6. Gastrocopta holzingeri St. Joliet, 111. 47545 25 



7. Gastrocopta h. agna P. & V. Trinidad, Colo. 93052.. 26 



8. Gastrocopta contracta peninsularis Pils. Crystal R., 



Citrus Co., Fla " 24 



9. 12. Gastrocopta contracta Say. Troy, N. Y 22 



10. Gastrocopta contracta Say. Fairfax Co., Va. 101573. 22 



11. Gastroeopta contracta Say. Washington, D. C. 11607. 22 



PLATE 3. Gastrocopta. 



1, 4. G. contracta climeana Van. Type. 97605 24 



2, 3. G. pentodon Say. Lebanon Springs, N. Y. 68885. . 28 



5. G. pentodon Say. Ventnor, Atlantic City, N. J. 104640. 28 



6. G. pentodon Say. Ocean City, N. J. 72709 28 



7. 8. G. pentodon Say. Troy, N. Y. 58251 28 



9. G. p. tappaniana Ad. Philadelphia, Pa. 58224 33 



(361) 



