660 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



the third joint is not quite so long, and is scarcely half as thick as the second ; its tip 

 is acute, and reaches out as far as the end of the second joint of the maxillary palpi. 

 The maxillary palpi are four-jointed, very broad at the base ; the first joint is scarcely 

 half as long as broad; the third is a little longer than the second, while the fourth is 

 much slenderer than the others and about the length of the second joint. The man- 

 dibles are large and powerful, when closed not reaching as far as the end of the max- 

 illary palpi ; the ends are truncated, gouge-like. On the prothorax is a large, ob- 

 scurely marked, squarish, very slightly horny (chitinous) area, scattered over with 

 hairs, especially on the anterior edge. On the upper side of each segment of the body 

 is a broad oval area, with a series of oval gatherings or folds on each side of the 

 transverse mesial main fold; those on the three rings succeeding the head (thoracic) 

 are the same, but broader. There are no rudimentary thoracic legs. The end of the 

 abdomen is blunt, well rounded, with the extreme tip forming a rounded portion. It 

 is M& of an inch in length. 



Pupa. — White, and in the single specimen observed was quite far advanced, the 

 body being covered with hairs. The wings were quite free froui the body, aud the 

 antennae curved around outside the wing-covers, their tips meeting at the base of 

 the head. The first aud second pairs of legs are folded at right angles to the body, 

 the third pair being oblique to the body. The tips of the first pair of tarsi reach to 

 the base of the second pair of tarsi ; the tips of the second pair of tarsi do not reach 

 to the base of the third pair of tarsi, the third tarsi not reaching to the tip of the 

 abdomen by a distance equal to nearly their length. The prothorax is full and 

 convex, the hinder portion being larger in proportion to the rest of the body than 

 in the adult beetle. It is a quarter of an inch in length. 



The beetle. — The beetle is characterized by four raised lines on each wing-cover, 

 with five or six black dots on each line or rib. An oblique black line diverges from 

 each side of the scutellum. Just in front of the middle is a triangular pale space, 

 bounded behind by an oblique dark line. In color it resembles the bark of the ash ; it 

 is a quarter of an inch in length. Gray, with bands and spots of blackish pubescence. 

 Antennae about one and one-half the length of the body, joints blackish at the articu- 

 lations; hoary, mottled with cinereous and light brown between. Elytra hoary-cin- 

 ereous, or slightly shaded with light brown, marked with an imperfect broad trans- 

 verse band before the middle and with two oblique bands and many smaller spots of 

 blackish behind the middle ; in some specimens the gray predominates, in others black, 

 in a few the bands are almost obsolete, being merely spotted with black. Thorax with 

 two broad longitudinal lines converging to a point in foi'm of the letter V ; each side 

 behind the middle with an angular spine-like projection. Head depressed between 

 the antenufe, gray, with some small black spots ; on the occiput a posterior median 

 half-line and many small black spots, not equally well defiued in all specimens. 

 Beneath cinereous, incisures blackish ; legs gray, somewhat spotted with black. 

 Length, about .25 inch. (Shinier.) 



2. Micracis suturalis Le Conte. 

 Order Coleoptera ; family ScoLYTiDiE. 



Observing a small round hole, like a pin hole, in a dead prickly ash 

 bush, Dr. Shimer cut out two specimens of this timber beetle, and 

 afterwards obtained more by cutting in the dead wood, "where the 

 bark was adherent and where the Liopus larvjc had not worked. They 

 are only found in imago now, and in this state appear to have entered ; 

 their holes are entirely free from chips aud I usually found them with 

 their heads inward ; their holes frequently intersect and wind in various 

 directions; sometimes they have several e eternal openings, and when 



