CRYPTARCHA RITSEM^E. 247 



margins and the sides dusky reddish-testaceous, lateral 

 margins narrow and reflexed. Scutellum small, exfremely 

 finely punctured. Elytra about twice tlie length of the 

 prothorax, narrowed behind, finely and closely punctured, 

 ornamented with reddish-testaceous markings; humeral an- 

 gles rather prominent: each elytron with eight rows of 

 slightly raised pubescence; these rows of pubescence have 

 the appearance of strife and are not very conspicuous ; the in- 

 terstices rather broad. In the male the pygidium is den- 

 sely covered with fine yellowish-grey pubescence. Under- 

 side reddish- testaceous , shining , extremely finely punctured ; 

 abdominal segments very finely and sparingly pubescent. 

 Legs pale reddish-testaceous , the knees , tips of the tibiae 

 and tarsi black. — Length 3 — 4^ mm. 



The markings on the elytra differ in the sexes of this 

 species : in the male the elytra are pitchy black , with a 

 rather large irregular shaped testaceous patch near the 

 apex of each elytron ; in the female the apical patch is 

 much larger and extends quite to the apex , which is 

 dusky ; there are also two small circular spots placed obli- 

 quely, one near the humeral angle and the other on 

 the disc. 



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



After carefully comparing this insect with Mr. Reitter's 

 descriptions of the species of the genus, I have come to 

 the conclusion that it is allied to Cryptarcha Wallacei ') 

 of that author, described from Batchian. It differs, how- 

 ever , not only in having testaceous markings on the elytra , 

 but also in its broader form and in having the protho- 

 rax more strongly rounded at the sides. C. Wallacei is 

 represented in the Leyden Museum by a single specimen 

 from Saleyer determined by Mr. Reitter. 



Leyden Museum, September 1884. 



1) Verb. Ver. Brünn. XIII. p. 119. 1875. 



Notes from the Leyden Miuseutn, "Vol. VI. 



