Dkc 1894] NKUMiKGIiN ^; Dn \K. N . A. lloMIiYCKS. ]{]] 



connuent, short, transverse black strigai Secondaries white with 

 a very few strigai at outer margin, otherwise immaculate. Expanse 

 about 30 mm. 



Habitat^ Canada. | Ilerrich-Schaffer | 



Sub-family ( 'ossi.n.k. 



Genus Cossus Fabricius. 



1794 — Cosstis Fahricius, Ent. Syst., \'oI. HI (2), p. 8. 



iSio? — II Teredo IIiEiiNKK, Tentalmen. p, i. 



1S66 — Trypauiis Ra.mbur. Cat. I.ep And., Vol. II. p. 326. 



Synopsis of species. 



.Size large, expanse at least 45 mm. 



Dark colored ; collar black centerensis 



Paler, collar gray or white. 



Collar nearly wliite, priniaiies with very liistintt tr.uisverse black 



lines undosus. 



Collar yellowish gray ; clouiied along costa. 



Indistinctly reticulated, with prominent median line . populi. 

 Distinctly reticulated with black; mo' tied .... ore. 

 Size smaller, expanse not more than 40 mm. 



Pale, with distinct transverse lines perplexus. 



Darker, shaded, with no evident lines ..... mucidus. 



C. centerensis Li/it/ier. 



1S79 — Cossus ceiilereiisis I.intnk.k, Can. Ent., Vol. IX, p. 129. 



Fore wings heavily reticulated, some transverse lines more 

 prominent than others; the markings black on a sordid white 

 ground which is also powdered with black ; basal half obscured. 

 Secondaries translucent with merest trace of recticulations. 

 Abdomen blackish, obscurely banded with pale. K.xpanse, 50— 

 65 mm. 



Iljbitat, .\tlantic States. 



C. undosus Liiitner. 



iS-^S— Cossus uudosus LiNTNKR, Rep. N. V. State Mus.. \"..l. X.\X, p. 243. 



1S90 -Cossus brucei EuKNCii, Can. Ent., Vol. XXII, p 44. 



Pale gray, the reticulations much as in C. centerensis, but the 

 transverse lines are more strongly marked, especially a median^ 

 and sub-terminal one, and the white ground is less obscured '^y 

 brown powderings. Secondaries opaque white, finely and^d'ensely 

 recticulated. Expanse, 60—75 "^'''''• 



Habitat, Rocky Mountain region. 



