626 FAMILY IV. SCOLYTIDJE. 



plants, Quercus, Fagus, Tsuga, Pyrus. X. serratus Swaine 

 (1910-a, 162) is evidently synonymous. (Hopldns.} 



1004 (9104). ANISANDRUS PTRI Peck, Mass. Agr. Journ., IV, 1817, 205. 



Shining black, antennae, tibiae and tarsi ferruginous-yellow. Pro- 

 thorax covered in front with sharp tubercles arranged in transverse rows, 

 behind nearly smooth, the whole surface thinly covered with fine white 

 hairs. Elytra punctate-striate, obliquely flattened behind, the intervals 

 finely punctured and pubescent, the seventh acutely elevated toward the 

 tip, the elevations forming the acute margin of the declivity. Length, fe- 

 male, 2.73.2; male, 2 2.1 mm. 



Massachusetts, Pennsylvania. Orange Mts., Auglesea and 

 Jamesburg, N. J., May, cut from birch shoots. (Wenzel.) Dis- 

 trict of Columbia, in apple. (Ulke.) Swaine (uniting dispar 

 and pyri] gives the distribution as Canada, Eastern and Middle 

 United States, Europe, Asia Minor and Siberia ; and food plants, 

 fruit trees, Betula, Fagus, Quercus, Tsuga, and in Europe, many 

 others. This species has a habit, shared according to Hubbard 

 by obesus and tacliygraplius, of making circular galleries in small 

 branches of healthy trees, encircling the pith and perpendicular 

 brood chambers which ascend or descend from the main gallery 

 parallel with the grain of the wood. Branches thus girdled are 

 killed beyond the point of attack. Pears and apples suffer from 

 its attacks from Nova Scotia southward. It also girdles young 

 trees of many kinds \vhich have been injured by fire. 



The females of the European species, dispar Fab. (1792, 363) are 

 scarcely to be distinguished from those of pyri. The epistoma (mounted 

 in balsam) is emarginate in the middle, while that of pyri is sinuate. 

 The males of dispar are larger than those of pyri. the striae are more 

 deeply impressed and the interspaces have more or less regular rows of 

 small punctures. Length, dispar, female, 3.2 3.7 mm.; male, 2 2.2 mm. 



Tribe II. IPINI. 



Pronotum and elytra clothed with scales or hairs, very rarely 

 glabrous; abdominal sternite 7 with posterior margin rarely 

 rounded ; anterior tibiae broader toward apex or serrate on outer 

 margin; pronotuni with anterior dorsal area commonly rugose, 

 posteriorly more or less smooth; head concealed from above; 

 anterior tarsi with joint 3 simple.* (Fig. 139, B.) 



*In this and the remaining tribes the results of Dr. Hopkins' studies are only 

 partially published: some changes in classification and the descriptions of some new 

 species will therefore appear later in the publications of the Department of Agriculture 

 and should be consulted by the student, our aim being to present only the data pub- 

 lished up to April, 1916. 



