1019.] 247 



margins ; strial punctures round, striae impressed ; interspacial punctures con- 

 siderably finer than those of the striae ; 1st interspace with two irregular rows 

 of punctures; 2ud, 3rd, and 4th interspaces each with usually one row of punc- 

 tures, here and there impressed. Abdomen concave, covered with very short 

 and sparse erect hairs in both sexes ; in the male the .'5rd segment with a 

 horizontal median finger-shaped process on apical margin, the 4th segment 

 with a faint median tubercle on apical margin (fig. 1) ; in the female the 3rd 

 and 4th segments are simple. 



The proventriculusj(^^. 2) resembles that of Eccoptog aster ratzebiwgi Jans. ; 

 the anterior part of the proventricular plate (a) is covered with sharp cone- 

 shaped teeth, which are brown in colour and especially stout on the parts 

 adjacent to the medial margins ; the terminal parts of the apical laminate 

 teeth {b) are deeply and sharply splintered. 



Chitinous parts of the male organ of reproduction (fig. 3) distinguished by 

 the following characters. The body («) is canoe-shaped, with acuminated 

 apical end ; the lateral folds {b) do not touch one another ; the body-apodemes 

 (femora) (c) cross each other and are as long as the body itself; the hood- 

 shaped terminal plate {d) is rather solidly chitinous ; from under this plate 

 protrudes the praeputial sac (not indicated on the figure), the laminated coat 

 of which is provided with very fine chitinous teeth. 



The type of egg- and broad-galleries resembles that of Eccoptogaster 

 scolytus Fabr. ; the longitudinal egg-gallery has a slightly widened entrance 

 chamber at base and lies on the inside superficies of the bark, without touching 

 the wood ; the egg-gallery in question is 30 mm. long and 2'0 mm. wide ; from 

 each side of this gallery thirty close broad-galleries diverge, these latter not 

 cutting into the wood but just touching it ; each broad-gallery is nearly thi'ee 

 times as long as the egg-gallery. 



Ten specimens and one block with but one well-developed galler3\ 

 Under the bark of Ulmus sp., Vladivostok, 1915, Mr. B. Berger, 

 collector. 



The name o£ this new species is given in honour of the eminent 

 Russian Coleopterist Mr. G-. G-. Jacobson. 



Eccoptogaster semenovi, sp. n. 



Length l*7-2'2 mm. Body shining, dark brown ; elytra, anterior and 

 sometimes posterior margin of pronotum lighter; head, underside, and in 

 mature specimens also the pronotum, almost black; coxa, apex of the femur, 

 tibia, and tarsus reddish-brown. Fro7it with long aciculate scratches from 

 mouth to vertex ; flattened in male and bordered with sparse but long and 

 slightly curved hairs ; in the female convex, almost glabrous, covered with 

 tparse, fine, scarcely visible hairs. Pronotum as long as broad, with sides 

 nearly parallel at the base, then regularly rounded in front; dorsal area 

 covered with tine slightly oval punctures, which become rounder, coarser, and 

 separate one from another on the lateral areas. Elytra as wide as pronotum, 

 with the sides parallel in the basal half, then narrowed towards the apex ; the 

 leno-th compared to the width is as o : 4 ; strial punctures slightly elongated ; 

 the interspaces each with a row of punctures, considerably finer than those of 



