LeConte.] 378 [Feb. 1, 
behind the middle, and pointed at the posteriorend. Differs 
also from all previously known small species of the United 
States, by the thorax having a very short basal stria not con- 
tinued on the elytra. 
11. Dineutes angustus, n. sp—Narrower, smaller and more con- 
vex than D. discolor, elongate-oval, slightly narrowed in front, bluish- 
black, with slight metallic gloss. Prothorax very little wider than the 
head, sides straight, slightly oblique, transversely very convex. Elytra 
sparsely, finely punctured. striz obliterated ; sides feebly and narrowly ex- 
planate, scarcely undulated near the apex, which is (2) obtusely pro- 
longed. Under surface and legs rufo-testaceous. Length 9.5 mm.; .3875 
inch; breadth 4.5 mm.; .175 inch. 
Three females, collected by Dr. Palmer. The marginal 
line of the front margin of the prothorax is less interrupted 
in these specimens than in D. discolor, but I do not think 
this a character of any value. 
Table of Species of OCHTHERIUS. 
The number of species of Ochthebius in our fauna has increased to such 
an extent, that the recognition of the three new species collected by Mr. 
Schwarz would be facilitated by the description of those from other 
parts of the country. ~The following table contains those which I have been 
able to examine : 
vo 
Prothorax much wider than long, strongly rounded on the sides, disc 
strongly punctured and deeply channeled.............2.-eccceeeees 2; 
Prothorax much wider than long, dise lobed at the sides, discoidal im- 
pressions foveate, dorsalichanneldecepeeriecs seers se semeeec cs 5: 
Prothorax sub-quadrate, less rounded on the sides...........0..0085 8. 
Prothorax with deep discoidal impressions each side of dorsal channel ; 
pellucid margin suddenly dilated inwards at the base.............. 3. 
Prothorax with discoidal impressions faint or wanting ; pellucid margin 
slightly wider towardsithe DASE... 251s <0 c sieve = cvolare's- 4 seein 4. 
. Discoidal impressions united, forming a groove each side of the dorsal 
channel, sides of disc of prothorax curved............ 1. puncticollis. 
Discoidal impressions separate, sides of disc of prothorax curved....... 
2. discretus, n. sp. 
Discoidal impressions separate, sides of disc of prothorax straight...... 
3. rectus, nN. sp. 
. Lateral impressions large and broad, discoidal ones wanting.......... : 
4. cribricollis. 
Lateral impressions smaller, discoidal small, faint....5. attritus, n. sp. 
Lateral impressions small, discoidal wanting......... 6. simplex, n. sp. 
