a Family of Coleopterous Insects. 611 
posed this natural resemblance to consist, since I can scarcely - 
conceive that these insects are more nearly allied to Clerus than 
they are to Cerocoma. Swederus was equally distant from their 
true aflinities, when he considered Cerapterus as intermediate 
between Silpha and Hispa; but the legitimate study of affinities 
was in the days of these authors in its infancy. 
Latreille, in the Histoire Naturelle &c. vol. xi. p. 206. “profitant 
de quelques rapports naturels qu'ont ces insectes avec les Scolites, 
les Bostriches, les Cis," adds, ** J'avois soupconné qu'on devoit 
réunir les uns et les autres dans une méme famille. De nouvelles 
considerations ont confirmé ce sentiment, et malgré que les or- 
ganes de la manducation des Pausses diffèrent de ceux des Sco- 
lites, on voit cépendant qu'il y a entre eux une grande aflinité." 
He accordingly places Paussus immediately between the Cur- 
culionide and the genus Scolytus (a location by no means tena- 
ble), forming the genera Paussus, Scolytus (including the modern 
groups Scolytus, Tomicus, Hylesinus and Hylurgus), Platypus and 
Phioiotribus, into the family Scoriratres; the genera Bostri- 
chus, Cis and Cerylon, into that of BosrR1cuiNr ; and the genera 
Colydium, Nemosoma, Bitoma, Lyctus, Latridius, Silvanus, Trogo- 
sita, Meryx and Mycetophagus, into the family XyLopuacr. In 
the Genera Crustacearum &c. the family Paussili was established 
and placed between the Scolitaires and the Xylophagi; which 
latter family was made to include the Bostrichini as well as the 
genera of which it was previously composed. In the Considera- 
tions Générales the Pausside were properly still further removed 
from the Scolitaires, being placed between the Bostrichini (in- 
cluding both the Scolitaires and the Bostrichini) and the Xylo- 
phagi of the Histoire Naturelle. In the Règne Animal, Familles 
Naturelles, and 2nd edition of the Régne Animal, all these genera 
and families are formed into one great family group, under the 
name of Xylophagi, by which Latreille endeavours, but as it 
appears 
