Sept. 1897] Packard: Transformations of Hymenoptera. 113 



is exserted, the rhabdites, as usual, forming a square tip. The thorax 

 above is niuch as in Megachile, but the abdomen is more contracted at 

 base, and a little more acutely produced at tip, but otherwise much as 

 in Megachile; the edges of the abdominal segments are posteriorly 

 much thickened and minutely dentate. Length, .30 inch. 



It differs from Megachile in its longer, narrower head, narrower full 

 clypeus, the shorter, squarer labrum, the long lingua and maxillse, the 

 latter being nearly twice as long as in Megachile , also in the presence 

 of the four acute spines along the under side of the abdomen, as well 

 as in the longer, slenderer legs and the narrower base of the abdomen. 



Xylocopa virginica (^Drury). 



Larva. — Received July 8 from M. James Angus, of West Farms, 

 N. Y. 



Length, i inch; thickness, .28 inch. Larva nearly full grown. 

 The head is very small, and the jaws move rapidly, being thrust out 

 back and forth from beneath the labrum, which is very movable. 

 Body cylindrical and tapering to a point, so as to be very much alike at 

 both ends. The usual lateral swollen area is very faintly marked, ren- 

 dering the body still more cylindrical than usual. The segments of the 

 body are quite convex, the sutures being rather deeply impressed, but 

 they are not tuberculated above, though somewhat thickened on the 

 hinder edge. 



The larva is much like that of Bomhtis, but slenderer and tapering 

 more towards each end. 



Fig. II. Xylocopa virginicj. Larva natural size. (Emerton, ^/f/.) 



Anthrax sinuosa Wiedertnann. 



Larva. — We received July 8, i867, from Mr. James Angus, the 

 larva of this species (see Guide to Study of Insects, 397), but have not 

 published the following description : Body smooth, flattened, slowly 

 tapering towards each end, so that it is difficult to tell which is the head 

 or tail end. The head is oblong, with the jaws on the under side, re- 



