22 PROTECTIVE RESEMBLANCE. 
NOTE V. 
PROTECTIVE RESEMBLANCE 
BETWEEN THE SPECIES OF NOTHOPEUS PASC. ') 
AND FOSSORIAL WASPS 
BY 
C. RITSEMA Cz. 
The Leyden Museum received some weeks ago from 
Mr. Kleiweg de Zwaan a lot of Insects collected by him 
in the island of Nias. In this collection I found a male 
and a female of an interesting Longicorn, viz. Nothopeus 
hemipterus Oliv. (also known from Java, Burma and North- 
ern India) captured on Mount Sitoli, together with both 
sexes of a fossorial Hymenopteron belonging to the family 
Pompilidae, viz. Macromeris splendida Lep. (Pompilus coria- 
rius Taschb.) which wasp perfectly resembles the beetle, 
both insects being black with a strong metallic blue hue 
especially on the wings. Undoubtedly this is a not yet 
recorded case of protective resemblance between Longicorns 
and Fossorial Hymenoptera. 
As yet the following eight species are known in the 
genus Nothopeus and, certainly, they all will have their 
model. 
A. Species with short elytra. 
hemipterus Oliv. 1795 (Cerambyz). Java. 
sericeus Saund. 1853 (Colobus). N. China. 
cingalensis White, 1855 (Colobus). Ceylon. 
fulvus Bates, 1879 (Colobus). (? = C. velutinus 
Saund. il. Mun. Cat). Sylhet. 
1) = Colobus Serv. = Coloborhombus Thoms. (Coleoptera: Cerambycidae). 
Notes from the Leyden Museum, Vol. XXXIV. 
