80 THOS. L. CASEY. 



and two lateral, longitudinal rounded ridges of ver}' slight elevation. Prosternal 

 iriter-coxal process long, more or less acute at the extremity, toward which it is 

 slightly swollen. Mesosternal inter-coxal process broad and squarely truncated. 

 Lateral border of elytron equal to one-fourth of its width. Elytra covered with 

 foveate punctures, which in some specimens seem to be aggregated into disjointed 

 striae-like rows, while in others they have no visible order. Legs of same color as 

 the body, tarsi darker. Length 10.0— I.''.. mm. 



Atlantic Slope. 



Var. puniceiis Mann. — Differs from the preceding in the following^ 

 points : 



The body is more elongated, and usually of a brighter color. The first joint of 

 the antennae is usually of a dark testaceous, while in clavipes it is black. The 

 antennae are slightly longer, and the neck slightly narrower in puniceus. 

 Length 12.0—16.4 mm. 



Pacific Slope. Plate V, Fig. 3. 



This is a case where it seems as if simple climatic influence, and diver- 

 sity of physical conditions, had worked a change in a species in a com- 

 paratively short period of time ; the same is the case in Prostomis and 

 Brontes. It is the largest species of the family in our territory. 



I NO DeCasteln. 

 Antennae long, first joint large; the others moniliform, the last ovulate. Last 

 joint of maxillary palpi long and acuminate. Tarsi slender, last joint much 

 larger than the others. Body depressed. Head very large, broader than the pro- 

 thorax, not constricted behind ; eyes small. Prothorax flat, rounded anteriorly 

 and posteriorly, sinuous laterally. Scutellum small, rounded posteriorly. Elytra 

 quite long, flat and rounded behind. Abdomen short and broad. Legs moderate, 

 femora broad, compressed; tibiae unarmed. 



The above is the original diagnosis of De Castelnau as quoted by La- 

 cordaire in the Genera des Coleopteres, and founded on a Madagascan 

 species. It will be seen to require slight modification, at least for one of 

 our species. 



We have two species which may be distinguished as follows : 



Head broader than prothorax, eyes convex. 1. reclusa. 



Head equal in width to prothorax, eyes flattened... 2. iininuiida. 



These characters do not appear to depend upon sex. 



1. I. recllisa. Lee. — Form moderately elongated and depressed, surface 

 shining. Punctures of head and prothorax rather large in size, but very sparse 

 and shallow. Integuments thin and transparent, the folds of the wings being 

 visible through the elytra. Color very pale yellowish-testaceous. There is an 

 almost complete absence of pubescence. Head sub-quadrate, broader than long; 

 eyes small, but convex, in advance of prothorax, their own length. Prothorax 

 narrower than head and smaller, broader than long, and strongly narrowed be- 

 hind ; sides undulated, lateral striae absent. Scutellum very small, nearly cir- 

 cular, and slightly concave. Elytra at base as broad as the head, gradually widen- 



