246 MYSTROPS ORIENTALIS. 



broader than tlie prothorax, anterior and posterior angles 

 rounded, truncate behind, inner apical angles gradually 

 rouuded; humeral angles rather prominent; finely and irre- 

 gularly punctured: each elytron with the apex and a mo- 

 derately large spot at the shoulder black. Pygidium very 

 finely punctured , densely covered with fine grey pubescence. 

 Underside extremely finely punctured , the pubescence dense , 

 coloured as above. Legs pale reddish-testaceous and pu- 

 bescent. — Length 4 mm.; greatest width 2^ mm. 



Serdang , N. E. Sumatra (Hagen). — Two specimens. 



It may be found advisable hereafter to establish a new 

 genus for the reception of this pretty species, but for the 

 present, as only two female specimens were received, I 

 prefer to regard it as an abberrant Mystrops. It most 

 nearly approaches M. discoideus , Murr. •) in form ; the pro- 

 thorax is shorter with the sides more oblique and the scu- 

 tellum smaller , although the insect is considerably larger ; 

 the elytra are gradually rounded behind, leaving only the 

 pygidium and a small portion of the propygidium exposed , 

 thus contrasting with the female of M. discoideus which 

 has the elytra distinctly angulated; the colour and mark- 

 ings are also entirely difi'erent. 



2. Cryptarcha Mitsemce, n. sp. 

 Cryptarcha maculata , Murray in litt., nee Reitter. 



Elongate-ovate, rather convex, pitchy black, shining, 

 finely punctured and clothed with very fine yellow pubes- 

 cence. Head rather broad, transverse, very slightly de- 

 pressed in front, finely and irregularly punctured. An- 

 tennae testaceous , the club darker. Prothorax about twice 

 as broad as long , narrowed anteriorly , finely and closely 

 punctured , only feebly emarginate in front , the sides of 

 the emargination oblique; all the angles acute and pro- 

 minent; sides regularly rounded; the anterior and posterior 



1) Trans. Linn. Soc. XXIV. p. 412; pi. 32, fig. 5. 



.Notes from th.e Leyden JMuseum, Vol. "VI. 



