78 Cameron, Hymenoptera Orientalia. 



M. cedipus, but the latter is easily known from it by the 

 thorax being contracted in the middle. 



Head large, a little broader than the thorax ; coarsely 

 longitudinally striolated ; the striae running into reticula- 

 tions towards the antennas ; black ; the front and vertex 

 broadly ferruginous ; the ferruginous colour extending 

 to a little below the bottom of the eyes ; the antennal 

 tubercles and a stripe on the mandibles ferruginous. The 

 scape of the antennae covered with long silvery hairs, the 

 rlagellum sparsely with a pale down. Thorax short, not 

 much longer than the head ; coarsely rugosely punctured, 

 sparsely covered with black hairs ; the apex of the median 

 segment oblique; the pleurae excavated, shining, impunc- 

 tate ; the base and apex a little pilose ; at the top in 

 the middle the median segment ends in a sharp spine. 

 Abdomen a little longer than the head and thorax united ; 

 the base obliquely truncated, with a narrow margin at its 

 apex, and with a spot of pale golden pubescence in its 

 centre above ; at the apex of the second segment there is a 

 central and a lateral somewhat larger oval mark of pale 

 golden pubescence ; the other segments have a somewhat 

 squarish mark in the middle of the same colour. The 

 ventral segments punctured, the basal segment much 

 more strongly than the others ; they are fringed with 

 fulvous hairs. Legs entirely black, bearing white hair. 



The present species may, of course, be the 2 of my 

 M. cedipus, but this is a point which can only be 

 decided by direct observation. The head in M. Rothneyi 

 is wider compared to the prothorax ; the mesothorax is 

 stoutly spined ; the front and vertex strongly longi- 

 tudinally striated all over, while in M. cedipus it is only 

 punctured ; the head behind the eyes in M. cedipus is much 

 more thickly covered with white hairs. There is no 

 appreciable difference in the form and coloration of the 

 two ; in M. Rothneyi the sides of the median segment are 



