DISTRIBUTION OF COLEOFTERA. 407 



590. Scolytus rugulosus Ratz. — Probably introduced from Europe, it is in many 



places from the Atlantic to the Mississippi very destructive to peach, 

 cherry and other fruit trees. Another species, only separable from it 

 by microscopy, breeds in dead hickory limbs. Can. Ent. xvi, 161; xvii, 

 48 ; Pr. Ent. Soc. Wash, i, 30. Turkestan. Heyden, 182. 



591. Crypturgus pusillus Gyll., atomns Lee. — "Canada, Massachusetts, New 



York, Pennsylvania, West Virginia Length .04 inch." Mou. 387; Ent. 

 Am. ii, .56. Europe, Japan. 

 Obs. — Hylurgus piniperda Linn., analogus Lee, a subcosmopolite species, 

 was found once in New York, and haviiig never been duplicated, has 

 been erased from the American catalogue. 



592. Hylastes glabratus Zett., decnmanus Er., pinifex Fitch. — Queen Charlotte 



Island, Luke Superior, Canada, Wisconsin, Ohio, Pennsylvania, West 

 Virginia, New York. Northern and mountainous Europe, eastern Si- 

 beria, the Amur. Heyden, 182; Col. Am. 156. 



593. Hylastes trifolii Mull., obscurus Marsh. — This European beetle was first 



discovered in this country in 1878 in Yates County, N. Y., depredating 

 on clover, and is now spread westward to Indiana. Lintner, 1st Eep. 

 N. Y., 247; Riley, Eep. Dept. Agric. 1878; Am. Entomologist iii, 180. 

 Webster, Proc. Ind. Acad. Sci. 1892, p. 84. 

 ANTHRIBID.^.. 



594. Arseocerus fasciculatus DeG.. co/fca; Fab., cnpillicornis Sny. — This species 



is cosmopolite, being carried from place to place by commerce. In this 

 country it occurs in many places on both sides of the continent. I have 

 specimens from Florida, New York and Oregon. 



An analysis of the distribution given for the species here enu- 

 merated shows that a certain number are at present known only 

 from North America and northern Asia, a certain number from 

 North America and Europe, while the large remainder occurs in all 

 of the three divisions, many of which extend to other portions of 

 the globe, or are cosmopolitan or subcosmopolitan, being distributed 

 extensively by commerce. 



Though the subject is beset with doubts and difficulties, an attempt 

 is made in the subjoined lists to separate the species into divisions to 

 represent their probable origin in North America relatively with 

 other portions of the globe. Species which apparently were in North 

 America at the time of its discovery by Columbus are set down as 

 native. 



Future investigations and discoveries may add to or extract from 

 these lists which represent only the opinion of the writer founded on 

 deductions from the distribution of each species as recorded in this 

 catalogue. Species cosmopolite, or tending to become so through 

 commerce, are separated from the fourth and shown in a special list. 



The number of families represented is 50, the same as in the first 

 edition ; the number of genera 299, and the number of species 594. 



TRANS. AM. KNT. SOC. XXI. DECEMBER, 1894. 



