306 
NORTH AMERICAN GYRINUS (cOLEOPTERa) 
7. G. marginellus new species. 
8. G. dichrous LeConte, 1868, loc. cit., j). 368, 371. 
0. G. latilimbus new species. 
limbatus LeConte, nec Say. ' 
10. G. bifarius new species. 
11. G. confinis LeConte, 1868, loc. cit., p. 368, 370. 
12. G. plicifer LeConte, 1851, Ann. Lyc. Nat. Hist., New York, v, p. 209. 
13. C. pachysotmis new species. 
14. G. (ievatus LeConte, 1868, loc. cit., p. 368, 371. 
15. G. ennsohrinus LeConte, 1851, loc. cit., j). 209. 
16. G. (iquiris LeConte, 1868, loc. cit., p. 368, 371. 
17. G. lecontei new species. 
ventrulis LeConte. nec Kirby. 
18. G. maculiventris LeConte, 1868, loc. cit., p. 368, 371. 
19. G. plewalis new species. 
20. G. affinis Aube, 1838, Spec., p. 669. 
.? canadensis Regimbart, 1883, Ann. Soc. Ent. Fr., 1883, p. 159. 
21. G. pectoralis LeConte, 1868, loc. cit., p. 370, 372. 
22. G. parcus Say, 1834, Trans. Ain. Phil. Soc., p. 448; ed. LeConte, ii, 
p. 562. 
23. G. borealis Aube, 1838, Spec., p. 692. 
? corpulentus Regimbart, 1883, Ann. Soc. Ent. Fr., 1883, p. 178. 
24. G. pugionis new species. 
25. G. pernilidus LeConte, 1868, loc. cit., p. 369, 372. 
26. G. picipcs Aube, 1838, Sjiec., p. 694. 
27. (1. lugens LeConte, 1868, loc. cit., p. 369, 372. 
28. G. analis Say, 1825, Trans. Am. Phil. Soc., ii, p. 108; ed. Le C., ii, ]i. 
520. 
29. G. opacus Sahlberg, 1817, Ins. Fenn., iv, p. 45. 
)U). G. wallisi new species. 
31. G.frosti new' .species. 
32. G. gibber LeConte, 1868, loc. cit., p. 370, 372. 
33. G. impressicollis Kirby, 1837, Faun. Bor. Amor., iv., p. 79. 
Unidentified Species 
G. sagi Aube, 1838, Spec., p. 698. 
G. lalendis Aube, 1838, Sjiec., p. 673. 
G.fn^^cipes Motschulsky, 1859, Bull. Soc. Nat. Mosc., ii, j). 173. 
G. niargi nice n Iris Motscluilsky, ibid., p. 174. 
ItXl’EANATION OK PlATE X\'I 
.M;d(‘ geriilalia as vii'W'cd I'rom above. 'I'he mimlxa’s an' tliosi' attachi'd 
In I lie specie's in lh(' above' lisl. Figure's 33a aiiel 33b sheiw supi'iietr and 
lale'ial vie'ws re'Sjie'e't ive-ly. In figure's IS anel 27 I he- siele' vie'w eil' I he' lip eil' 
the' inielelli' leibe' is alsei sheiwii. 
