CARABIDAE. 35 



joint acuminate, not shorter than the penultimate joint. The men- 

 tum is toothed; the third joint, and even the second joint, of the 

 antennas is pubescent. The head has the frontal impressions long 

 and deep, curved behind the eyes, forming a slight posterior con- 

 striction. The anterior tibiaa are either linear (Anophthalmus) or 

 slightly dilated, not spinous at the tip. The anterior tarsi of the 

 male have two somewhat obliquely dilated joints, furnished beneath 

 with squamiform papillae. The epimera of the mesothorax are 

 short, and somewhat triangular. The elytra are rounded at the 

 apex, with the eighth stria anteriorly confluent with the margin, 

 and most frequently interrupted at the middle. 



Two genera are represented in our fauna; both have the first 

 stria of the elytra recurved at the apex. 



Eyes wanting ; anterior tibia linear. Anophthalmus. 



Eyes large ; anterior tibiae slightly thickened. Trechus. 



Anophthalmia Tellkampjii is found in the Mammoth Cave, 

 Kentucky; other species will be found in our other caves, when 

 scientific zeal shall cause them to be properly explored. Trechus 

 is found on both sides of the continent, but only in northern 

 regions. The European T. rvhens has recently been found by 

 Mr. H. TJlke in Nova Scotia. Trechus includes Epaphius. 



I formerly placed Tachys in this tribe; by the definitions here 

 given it belongs more properly to the next; but with the European 

 genus Perileptus Schaum there is a very close osculation between 

 the two tribes. 



Tribe XVI.— BEMBIDIIJVI. 



The ligula has but two bristles at the apex, which is free for a 

 very short distance; the paraglossa? are distinct, scarcely longer 

 than the ligula; the penultimate joint of the palpi is obconical, 

 and the last joint much narrower and shorter, so as to be subulate. 

 The mentum is strongly toothed, and the tooth is usually emar- 

 ginate. The two basal joints of the antennae are glabrous, the 

 third is pubescent. The form of the head and frontal impressions 

 are variable. The anterior tibiae are slightly spinous at tip, either 

 squarely truncate as usual, or slightly dilated and obliquely trun- 

 cate, with the outer angle a little prominent. The anterior tarsi 

 of the male are usually somewhat obliquely dilated in the first and 

 second joints, the first being much larger than the second, but in 



