86 GENUS MEGALODONTES. 



ratus of bees. The outer lobe of the maxilla is much 

 longer than the inner ; the stipes is divided in two ; 

 namely, the main piece and a smaller lateral piece to 

 which the palpi are attached, and which is prolonged 

 to the base of the stipes (Vol. II, PL VI, fig. 10 b). 

 From the top of this piece a horny belt proceeds to 

 the labium, which is thus firmly united to the maxilla. 

 The palpi do not reach much above the top of the long 

 outer lobe of the maxilla. The labial palpi do not 

 reach the top of the lobes of the labium. The thorax 

 is arched on upper side, not much longer than broad; 

 the prosternum projects a little so that the head has 

 considerable powers of movability ; the pronotum is 

 broadly rounded behind. The middle lobe of the 

 mesonotum on this account is but slightly developed ; 

 the sutures of the lobes are not always very clearly 

 distinguishable; the abdomen has the blotch long, 

 narrow ; the abdomen itself is rather flat, but still 

 arched on upper side. 



The radial nervure, at the base, issues from the 

 costa a little in front of stigma ; the transverse radial 

 from the stigma, joining the radial in such a way that 

 there is no clear point of union, the basal part of the 

 radial nervure, on the other hand, uniting with the 

 transverse at an angle, thus giving the first radial ner- 

 vure the appearance of being the first cubital, and of 

 there being only one radial cellule ; the second radial 

 cellule is round on the lower side ; the second angled 

 where the first transverse cubital nervure is received ; 

 the second radial cellule receives the other two trans- 

 verse cubital nervures. The radial cellule has a 

 bordering nervure on upper side from the stigma to 

 where the radial nervure unites with the edge of the 

 wing. 



/Synopsis of Species. 



1 (2) The appendages of antennae equal in length to two of the 

 joints; antennas black or testaceous at base. Mesonotum 

 with only two or no yellow marks. Klugii. 



