264 Mr. G. Lewis on 



Mars., but the elytra are wholly and distinct striate like those 

 of the European species S. harhatus, Schall. S. niponicus 

 differs markedly, however, from the last-named in the elytral 

 interstices being much more rugose and more convex. 

 Hah. Fukushima. One example, 28th July, 1881. 



MiKADONius, gen. nov. 



This genus should be placed close to Serrojjolpus ; the most 

 conspicuous differences consist in the prominent eyes, form of 

 the thorax, and in the shortness of the third joint of the pos- 

 terior tarsus. JJody elongate, parallel laterally; head scarcely 

 as wide as the anterior part of the thorax ; eyes prominent, 

 finely granulate ; maxillary palpi, last joint cultriform and 

 large, other joints triangular, enlarged on the inner edge ; 

 antennai filiform, long, and slender, first joint stoutest, second 

 much less robust and about half the length, third as long as 

 the basal joint, 4, 6, 7 equal, fifth shorter than the fourth, 

 8-11 equal and rather longer than the seventh ; thorax 

 widest behind, narrowest in front ; scutellum somewhat 

 square; legs elongate; tibiffi with two strong and lengthy 

 spurs at the tarsal end; tarsi, the fourth joints of anterior and 

 intermediate pairs short and coequal with those of the third 

 joints of the posterior pair. 



Mikadonius gracilis^ sp. n. (Pi. VIII. fig. 2, $^ 



Elongatus, angustatus. g-riseo-puhescens, vix uitidus, capite thoraceque 

 densissime pimctatis ; elytris in colore variabilibus ; antennis 

 pedibusque testa ceis. 



L. 7-12 mill. 6 , 9-13 mill. $ . 



Elongate, narrow, parallel at the sides, with grey or tawny 

 pubescence ; the head and thorax very closely punctured, tlie 

 latter narrowest anteriorly, slightly swollen about the middle, 

 widest behind ; the elytral sculpture finer and less deep than 

 that of the head and thorax. The sexes differ in colour. Male : 

 mouth-organs, head (except a wide black band between the 

 eyes) , undersides of basal joints of the antennas, legs, under- 

 side of the thorax, mesosternum, and first segment of abdomen 

 (partly) testaceous ; metasternum and apical joints of the 

 abdomen blackish brown ; elytra infuscate on the margins, 

 with a pale longitudinal vitta as shown in the figure. Female : 

 mouth-organs, apical joints of antennae somewhat vaguely, 

 tibise, and tarsi testaceous; elytra with a short palish vitta in 

 the middle of the wing-case, but close to the base, and a 

 longer not well-defined second vitta, which commences near 

 the humeral angle and continues down nearly to the apex, 



