THE CANADIAN ENTOMOLOGIST. 71 



divided into two spots and continued posteriorly as a ventro-lateral trian- 

 gular spot on bas6 of 3. Dorsum of 2 with a yellowish spot on each side 

 distally, followed on dorsum of 3 by a smaller and sometimes obsolete 

 basal spot which is often connected below with the ventro-lateral spot of 

 the same segment. 



Superior appendages black, about as long as 9 + 10, separated at 

 their origin by a space about equal in width to base of one of the ap- 

 pendages ; the latter broadest at base, becoming narrower and somewhat 

 incurved in proximal fourth, where both margins as seen from above are 

 gently concave ; middle third gradually approaching middle line, some- 

 what tumid and rounded, with sides parallel ; distal third very slightly 

 tapering, bent inwards, forming an angle of about 40° with its fellow of the 

 opposite side. Viewed from the side they appear distinctly but not 

 strongly arched, with the apices strongly upturned and ending in a re- 

 curved point. The outer margin is bent downwards and bears a large but 

 obtuse basal tooth, usually followed before the middle by another very in- 

 conspicuous one, after which it fades into the rounded lateral surface. 

 Both teeth are usually visible from above. Ventral surface concave at 

 base, beyond rounded and somewhat tumid. A slight ridge passes from the 

 concavity obliquely backwards and inwards, forming a prominence which 

 appears as a very obtuse and rounded angle when viewed from the side, 

 thence continued as the slightly angular inner margin. The hairs on 

 distal half above are long and dense, being much longer than depth of 

 appendage. 



Inferior appendage about half as long as superiors, triangular, about 

 jA as broad at base as long, sides slightly convex, apex rounded, lateral 

 surfaces sulcate ; in profile view it forms a shallow curve with the con- 

 cavity upwards, the upper and lower margins nearly parallel, apex sur- 

 mounted by a short recurved tooth. 



? diflfers from $ in markings as follows : The ventro-lateral spot 

 on 2 is unbroken, well-defined above, but fades below into the dull yel- 

 lowish brown which covers most of the ventral surface of 2 and 3. 

 Dorsum of 3 is broadly margined with brownish yellow, most consjncuous 

 on proximal half, and continued as a less distinct elongate spot on basal 

 third of 4. Indistinct spots of same colour occupy antero-lateral angles 

 of 5, 6, 7 and 8. Abdomen broadest at middle of 2, where it is about' 

 twice as broad as at base of 9, tapering equally to middle of 9, whose 

 sides diverge in distal half so that breadth at apex is about ^"greater 



