150 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



basal part reaches the full width of the head; it is deeply concave on the 

 apical edge, in the middle of which is a long, slender, tooth-like projection 

 extending up between the two upper sections. Each of these sections are 

 somewhat triangular in shape; the inner side terminates into a tooth-like 

 projection at the apex and below this, on the outer edge, is a similar pro- 

 jection. The antennae are located near the basal outer edge of this last 

 mentioned projection. The antennae have two cylindrical joints of nearly 

 equal length, the first joint is reddish-brown at the base and yellowish at 

 the apex, while the coloring of the second joint is the reverse. All the 

 bristles of the head are pale yellow. 



For details of head see drawing, figure 5 dorsal view and figure 4, ventral 

 view. 



First segment rather broad and rounded. At the apex is an elliptical 

 area finely granulated, being much finer at the base. Just below this is a 

 perfectly smooth, narrow, transverse band, not quite reaching the lateral 

 edges. The second segment is about half the width of the first, along the 

 apical edge is a narrow transverse space which is very finely rugose. The 

 third segment is very narrow, being about half the width of the second 

 segment. Near the apical edge are two rather sharp transverse wrinkles 

 slightly depressed or flattened in the middle. Segments four to ten are 

 about the same width. Segments four to nine, each have one pair of am- 

 pullae on the dorsum and two pairs on the ventral side. The last segment is 

 deeply depressed on the basal half, faintly rugose and with two well de- 

 fined longitudinal ridges on the lateral edge. Towards each outer edge is a 

 large spiracle, dark yellowish-brown and rather heavily chitinized. For 

 further details see figure 1. The apical half of this segment is raised much 

 higher than the basal half, slightly rugose and terminates into a broad and 

 narrow, reddish, chitinous plate, black on the outer edge, in the center of 

 which is a prominent, black, tooth-like projection. This chitinous plate 

 has a large, yellowish bristle extending from the under side near both of the 

 outer corners. Near the middle of the last segment, on the elevated por- 

 tion, are four large yellowish bristles, in a transverse row. 



The details of the under side of the head can best be seen in the drawing, 

 figure 4. All the dark portion is heavily chitinized and black, the dark 

 area in the central, basal part is reddish on the apical edge. The bristles 

 are yellowish. 



On the apical edge of the ventral side of the first segment is a narrow 

 crescent-shaped area finely granular. Segments one to nine each have a 

 yellow bristle, near the middle and out near the lateral edge. 



At the apex of the last segment, on the ventral side, near each outer 

 basal corner is a yellow bristle. At the base of this segment are several, 

 short, well marked ridges. 



" On the side of the first segment, near the base is a spiracle, nearly cir- 

 cular having three faint ridges on the cephalic side, just below these is an 

 opening which is pit-like in appearance. It is dark brown, chitinous and 

 faintly granular, located in a small depression in the larva. For details 

 see drawing, figure a. 



