288 Mr. II. W. Bates 07i the 
front. Head as in Omaseus and Sterojms, "witli thick 
neck and prominent eyes, punctured above, most distinctly 
so on the sides. The anterior angles of the thorax are 
produced, the hind obtuse, but with a dentiform projec- 
tion ; the basal fovea large, deep, bistrlated and punctured ; 
externally a fold runs parallel to the lateral margin and 
reaches the base. Elytra not Avidcr than the thorax ; 
narrowed and sharply rounded at apex. Palpi stout ; 
terminal joints rather ovoid-cylindrical, but sharply trun- 
cated. Prosternal process margined. Metasternal epimcra 
about as broad as long. 
Ft. ( Omaseus) Japonicus, Motsch. Etud. Entom. 
1860, p. 6. 
I have seen uo specimens to which Motschulsky's de- 
scription applies. 
Pt.{Platusma) subovafus, Motsch. Etud. Entom. 1860, 
p. 6 ; Moraw. Beitr. p. 56. 
Hakodadi. Also south coast of JNIanchuria. 
ISIr. Lewis did not meet Avith this species. 
Pt. ( Stei'opus) orientalis, Motsch. Ins. d. 1. Siberie, 
p. 151 ; Morawitz, Beitr. p. 58. 
Ycsso. 
j\Ir. Lewis did not meet with this species, of which I 
have examined a large scries from Eastern Siberia. 
Pt. ( Sterop7is) tropiduriis, n. sp. 
Pt. madklo major, magls clongatus, niger nitidus, thorace 
lateribus parum rotundato scd valde angustato, angulis 
posticis oblique obtuse truncatis, fovcis basalibus latis, 
vagis, crebre rugoso-punctatis, absque plica latcrali; elytris 
posticc paululum dilatatis, fortitcr striatis sed interstitiis 
planis, striis fundo punctulatis ; corpore subtus la3vi. 
Long. 8 lin. ^ $ . 
$ scgmeuto ultimo ventrali, medio basi tuberculo clon- 
gato valde compresso ; 2 latissime rotundato. 
lliogo. 
The elytra are much longer in proportion than in Pt. 
madidus, with the shoulders rather more advanced ; tlio 
sitriiu arc very strongly and sharply imj)rcssed, with faint 
transverse punctures in their bottom ; the interstices are 
plane, and the third has three punctures. The head is 
