72 Mr. Gr. Lewis on Erotylidse fro7n Japan. 



EuDJilMONIUS. 



Antennge fine and slender, the length of the thorax, first 

 joint relatively stout and short, second short and much con- 

 stricted before the middle, third somewhat small at the base and 

 not so long as fourth and fifth together, fourth to eighth 

 moniliform, sixth to eighth smaller than two preceding, ninth 

 to eleventh equal in length, feebly (thej are almost moniliform) 

 dilated and not closely pressed ; last joint of maxillary palpus 

 very transverse ; head with eyes prominent, not coarsely 

 granulate ; thorax broader than long, the middle of the base 

 encroaching on the region of the scutellum ; elytra sub- 

 parallel, rather convex, with eight striee ; a sutural stria ; legs 

 rather short, tarsal joints one to three equal in length and 

 breadth. Presternum striate between the coxse, striae touching 

 the base ; mesosternum moderately large. 



^ . Epistoma tuberculate anteriorly ; tibisB robust, anterior 

 pair strongly rugose on the inner surface ; tarsi moderately 

 dilated. 



? . Epistoma subconvex ; head smaller than in male, with 

 the eyes more prominent ; the legs and tarsi also are more 

 slender. This sex is much smaller than the male. 



The genus is allied to Amblyopus. 



Eudcemonius tuhercuUfrons. 



Oblongo-ovatus, parum convexus ; capite nigro ; thorace flavo, ante 

 scutellum pianctisque quatuor disci nigris ; elytris punctato-striatis, 

 pedibusque nigris. L, 5-8 mill. 



Oblong-ovate, rather convex ; head, antennse (except second 

 joint, which is pitchy red) , elytra, legs, meso- and metasterna, 

 and base of prosternum narrowly black ; thorax flavous, with 

 four black spots in a transverse line and a large black spot 

 before the scutellum ; head and thorax somewhat closely 

 punctured, the latter with marginal striae on all sides fine ; 

 elytra punctate-striate, with an additional sutural stria which 

 does not touch the base ; the interstitial punctuation is fine and 

 scattered. The prosternum is somewhat raised in the centre, 

 with two short coxal stride ; the mesosternum is proportioned 

 much as in Amhlyopus, to which genus Eudcemonius is appa- 

 rently allied. The sexual characters as given above are very 

 remarkable and conspicuous. 



I took it at Miyanoshita and at Chiuzenji, abundantly in 

 fungi on old cherry-trees, in May and June, and in August a 

 few specimens at Sapporo, in Yezo. 



