126 GEO. H. HORN, M. D. 



M. Ollia I i it lis, n. sp. — Body beneath piceous. Head flat above, coarsely punc- 

 tured, orange-yellow, piceous behind the eyes. Antennae piceous, four or five 

 basal joints pale. Thorax oval, narrowed in front, a little longer than wide, apex 

 truncate, base feebly arcuate, hind angles rounded, disc convex, coarsely and 

 moderately densely punctured, surface orange-yellow sometimes with a median 

 piceous stripe. Elytra coarsely punctured, the punctures gradually finer to apex, 

 surface finely pubescent, color orange-yellow with a common sutural piceous stripe 

 broader at either end, not attaining the apex, sides posteriorly piceous, this color 

 sometimes extending and joining the sutural stripe, forming an anchor. Legs 

 pale yellow. Length .14— .16 inch; 3.5—4 mm. (PI. VI, fig. 17). 



In the male the last ventral segment is feebly emarginate, and entirely 

 piceous in color. In the female arcuate and tipped yellow. 



Occurs in western Kansas, collected by Dr. H. A. Brous. 



In the accompanying figure the head is represented fully extended. 

 Iti nature it is deflexed and inserted nearly as far as the eyes. The first 

 glance at the species recalls some of the forms of Omalini ( Trigonodemus) y 

 hence the specific name. 



Synopsis or the species of the tribe LEBIINI. 



BY GEORGE H. HORN, M. D. 



During the past few years Baron Chaudoir has excited an interest 

 in the truncatipenne series of Carabidae by his numerous monographic 

 publications, which show a conscientious and profound study of the 

 genera and species of this group. While I have been able to follow 

 him satisfactorily in all the minor details of his work, I have utterly 

 failed to see in his larger subdivisions any evidence of a systematic 

 treatment of the subject. 



It will be evident to any one studying Chaudoir's essays on the 

 truncatipenne series that the ligula and paraglossae play an important 

 part in the diagnoses of the divisions whether called tribes or groups. 

 Thinking that the key to the system might be found by a careful study 

 of these organs, dissections were prepared and drawings made of the 

 parts, for comparison, and the conclusion was forced upon me, as it will 

 be on any one who will adopt the same course, that the mouth organs 

 are of very little value in defining groups higher than genera and when 

 used at all must be used with extreme caution. 



With the desire of doing full justice to the subject dissections were 

 made of all accessible genera many of which have been published 

 in the preceding volume. The further the dissections were made the 

 more evident it became that the ligula must be discarded as the basis 



