426 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
CARABIDAE. 
BEMBIDIUM OBDUCTUM Scudder. 
One poor specimen, No. 2,426 M. C. Z. (No. 6,529 S. H. Scudder 
Coll.) seems to belong here. 
AMARA REVOCATA Scudder. 
Two examples, No. 2,427 M. C. Z. (No. 3,233 S. H. Scudder Coll.); 
No. 2,428 M. C. Z. (No. 5,580 S. H. Scudder Coll.) are referred to this 
species though neither is in good condition. 
AMARA POWELLII Scudder. 
One specimen, No. 2,429 M. C. Z. (No. 264 S. H. Scudder Coll.). 
AMARA COCKERELLI Wickham. | 
A single specimen, No. 2,480 M. C. Z. (No. 7,008 S. H. Scudder 
Coll.) referred here without much doubt. 
DYTISCIDAE. 
BIDESSUS LAMINARUM, sp. nov. 
Plate. 1, fig. 1. 
Form similar to that of the recent B. affinis. The specimen shows 
either a ventral view or the dorsal aspect of an insect from which the 
elytra have been lost and gives no sculptural characters of any value. _ 
The prosternum is like that of recent Bidessus, but the sutures be- / 
tween the proximal abdominal segments are more distinct than in the , 
living form with which I have compared it. Length, 2.25 mm. 
Described from a single specimen. j 
Type.— No. 2,431M.C.Z. Florissant, Col. (No. 11,166 S. H. Seud- 
der Coll.). The stone carries a small parasitic Hymenopteron on the 
same side as the Bidessus, while on the opposite face is Dr. Scudder’s 
number, cited above, and the insect to which it originally referred. 
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