Dec 1894] NeUAUEGEN & DVAR. N. A. BOMBVCES. 161 



confluent, short, transverse black strigce. Secondaries white with 

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

 about 30 mm. 



Habitat^ Canada. [Herrich-Sch;iffer ] 



Sub-family Cossin/E. 



Genus Cossus Fahricius. 



1794 — Cossus Fabricius, Ent. Syst., Vol. Ill (2), p. 8. 



iSiO? — II Teredo Huebner, Tentatmen, p, i. 



1866 — TrypaiiHs Rambur, Cat. I.ep And., Vol. II, p. 326. 



Sy)20psis of species. 



Size large, expanse at least 45 mm. 



Dark colored ; collar black centerensis 



Paler, collar gray or white. 



Collar nearly white, primaries with very distinct transverse black 



lines undosus. 



Collar yellowish gray ; clouded along costa. 



Indistinctly reticulated, with prominent median line . populi. 

 Distinctly reticulated with black; mo'.tled . , . . orc. 



Size smaller, expanse not more than 40 mm. 



Pale, with distinct transverse lines ..... perplexus. 



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



C. centerensis Liutiier. 



1879 — Cossus centeretisis LiNTN'KK, Can. Ent., Vol. IX, p. I2g. 



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. Expanse, 50 — 

 65 mm. 



Habitat, Atlantic States. 



C. undosus Lintner. 



187S — Cossus undosus LiNTNER, Rep. N. Y. State Mus., \'ol. XXX, p. 243. 

 1890 -Cossus hrucei F'rench, 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 by 

 brown powderings. Secondaries opaque white, finely and densely 

 recTticulated. Expanse, 60 — 75 mm. 



Habitat, Rocky Mountain region. 



