1919.] 249 



9th each provided with a row of very tine tubercles, perceptible only in rubbed 

 specimens, the 2nd, 4th, 6th, and 8th without tuberculation. Other morpho- 

 li)gical characters as iu Hylesimis fraxmi Panz. 



Under the bark of Fraxiniis manshnrtca Rupr. and Julians 

 onanslmrica Max. The galleries resemble those of II. fraxini: the 

 egg-galleiy transverse and double, the larval galleries a little shorter 

 and not so close. 



Vicinity of Vladivostolc, 1912, 1915, Messrs. A. Czerski, N. Delle, 

 B, Berger ; Manchuria, 1916, Mr. V, Verbickj'. 



Xylecliinus hergeri, sp. n. 



Length l-6-l'8 mm. Head black, finely granulated and densely punc- 

 tured; front with distinct carina, covered with rather short yellowish hairs, 

 which are a little longer at the sides and considerably longer above the mouth ; 

 antennae reddish-brown, club darker, funicle 5-jointed. Pronotum dark brown, 

 as broad as long, widest iu the middle, from above nearly round, without dis- 

 tinct elevated median line, closely punctured, the rather deep punctures bearing 

 small yellowish-brown scales or scale-like bristles, declining towards an imaginary 

 median line. Elytra brown, more than twice as long as wide, with regular 

 rows of round punctures ; interspaces flat, equally and rather sparsely covered 

 with small punctures, which bear very small, separate, rounded, yellowish- 

 brown scales, those on the 1st interspace along the suture longer and more 

 closely placed ; besides these rounded scales, each interspace is furnished with 

 a regular row of erect and rather long bristles, contrasting on the dark elytra 

 and their brown scales by their bright yellow colour. Underside black, legs 

 dark brown, knees and tarsi brown. 



A.S to the internal anatomy, the proventricular plate is characterized by 

 its smooth edged, not serrated, closing bristles ; and the male reproductive 

 organs by having the thin spicule bent in two places (tig. 6 A). 



Under the bark of the branches of Phellodendron amurense Rupr. 

 The galleries suggest those of Xylecliinus pilosus Knoch : egg-tunnels 

 mostly transverse, often with a widening in the middle ; larval mines 

 very confused (fig. 7). Vladivostok, 1915, Mr. B. Berger, collector. 



HyJastinus (? Hylastinoides, subgen. n.) alni Niisima.* 



Ijength 3*2 mm. Head black, tinely granulated, with separate punctures ; 

 front with irregular, somewhat wavy surface, sparsely covered with short 

 vellovvisli hairs ; antennae reddish-brown, funicle 7-joiuted, club conical, with 

 6 distinct setaceous annulations and with chitinous 2nd and 4th sutures 

 (fig. 8 A). Fronotimi wider than long (4 : 3), black, sparsely covered with very 

 fine, downy, yellowish-grey hairs, finely granulated, with shallow punctures, 

 some of which are coalescent ; anterior and median sections of the lateral areas 



* Japanese specimens dtecribed by Prof. Y. Niisima as Hi/lastes alni (Niisima, Y., "Die 

 Scolytiden Hokka.dus unter Berucksichtigung ihrer Bcdeutuug iiir Forstschaden," Journal of the 

 College of Agriculture, Tohoku Imperial University, Sapporo, Japan, vol. iii, part 2, 1909, p. 137) 

 correspond to those found iu Vladivostok. Our more detailed description Bho^¥s that the examples 

 from Vladivostok do uot belong to genus Hi/laates Eriehs. 



