764 BULLETIN UNITED STATES GEOLOGICAL SUEVEY. 



segments of the abdomeu ; the prothorax, slightly cracked; and a portion 

 of one of the mandibles. A species is indicated a little larger than L. 

 agilis LeC, and in many respects resembling it. The elytra are shaped 

 as there, with the same apical sinuation ; they are piceous, with a 

 metallic-blue reflection, exactly as in uiany species oi Loxandrus ; there 

 are nine distinctly and rather deeply and equally impressed strife, 

 rather faintly and not v ery profusely punctate ; the interspaces appear 

 as if minutely cracked, and with a simulation of excessively faint and 

 small fovere throughout, while the third has a more distinct, though still 

 rather shallow and rather large, fovea considerably behind the middle of 

 the apical half of the elytra; a second fovea appears in the third inter- 

 space, as far from the apical fovea as that is from the apex, but it is 

 situated laterally, encroaching on the stria within ilr. It is perhaps due 

 only to an excess of the simulating fovete that there is apparently a 

 row of approximated punctures, quite like those of the neighboring strite, 

 for a very short distance between the base of the sixth and seventh stride. 

 The first stria turns outward next the base, apparently to make room 

 for a scutellar stria, which does not appear to exist in this genus, but 

 which may probably form in this species the limit of the minute portion 

 of the elytron which passes beneath the scutellum in repose; plainly, how- 

 ever, it is correlated with the unuvsual basal curve of the first stria, in 

 which respect the fossil differs from all the species of Loxandrus I have 

 examined. The obliquely cut marginal fovete agree with those of L. agilis. 

 The prothorax is quadrate, the front margin very slightly angled, quite 

 as in L. erraticus Le C, the sides broadly rounded, fullest anteriorly, 

 with an exceedingly slight median sulcus (indicated by a slender crack), 

 and more distinct posterior sublateral sulci (indicated by wider cracks), 

 and between which the hind border is scarcely convex, and not at all 

 as in L. erraticus. The surface of the prothorax is smooth ; the abdo- 

 men is also smooth. The part of the mandible remaining is only the 

 basal "molar" portion, armed with six or seven mammilate conical teeth, 

 or rather transverse ridges. Length of elytron 5.75™™; breadth 2™™; 

 length of prothorax 2.25™™; breadth 3.5™™; breadth of abdomen 2.25™™. 

 This species differs from all Loxandri known to me in the coarseness 

 of the punctuation of the elytra, the roughness of the interspaces, the 

 position of the fovea of the third interspace, the intercalated false stria 

 at the base of the seventh interspace (which can hardly be entirely 

 fortuitous, since it is correlated with unusual unevenness of the surface 

 elsewhere), the basal deflection of the first stria, and the presence of an 

 inconspicuocs scutellar stria. Nevertheless, it has all the aspects of a 

 Loxandrus, and disagrees in more essential points from other Carahidoi. 



