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152 



ADEPHAGA. 











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from its allies by the third elytral interstice being tripunctate instead of bip 



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the punctures being small and situated nearly in the middle of the interstice. 









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Subdivision F. Subtruncati. 







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This subdivision is proposed for the reception of a number of genera which partake 

 of the characters on the one hand of the Tripalmati, and on the other of the Truncati- 













pennes, but 



that they seem to me to form a separate subtype of 



Carabidse, and ought not in a natural system to be included in one or the oth 



The 











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elytra agree with the subfamily -Anch 



the Truncatip 



subdivision in 





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having uninterrupted lateral 



mar 



but the form of the apex indicates a nearer 



relationship to the Truncatipennes than to the Tripal 



The form is modified from 



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genus, the apex being sometimes entire, and sometimes more or less distinctly 











cated ; but when entire there is no tendency to oblique 



which 



the 



prevailing character of the Tripalmati, and when truncated it is almost always in a 

 straight line, without sinuation or produced- angles, which is so common a condition in 





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the Truncatipennes. The basal margin of the elytra exhibits analogous modifications ; 

 but it never forms a right angle (with humeral plica) with the lateral margin, as pre- 





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valent in the Pterostichinse, and, in the less specialized genera, resembles that of certain 

 Anchomeninse in being broadly rounded at the shoulders, as though it were the con- 

















tinuation of the lateral margin, and suddenly dips at the peduncle to form a curved or 





straight fine margin to the scutellar striole. In proportion as the genera approach the 



Odacanthinse of the Truncatipennes subdivision, this peduncular margin 



tends to 



disappear, as in Casnonia and Odacantha; and in the extreme forms the humeral 

















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margin runs obliquely forward or becomes obsolete. With regard to the dilatation and 



the clothing of the palms of the male fore tarsi, the Subtruncati agree with the Tripalmati, 

 and differ exceedingly little from the Anchomenid type. The relationship of the chief 



















members of the subdivision to the Casnonice has been recognized by most modern syste- 

 matists ; but the older entomologists were more inclined to see a connexion between them 



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and the Bembidiinse, to which there is, indeed, much resemblance, both in facies and in 

 habits ; but the resemblance is one of analogy rather than of affinity. 









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Subfam. LACHNOPHOBINjE. 



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ANCHONODEEUS. 



Anchonoderus, Reiche, Rev. Zool. 1843, p. 38. 



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About a dozen species of this genus are known, all Tropical American, except one, 





which occurs in Texas. 







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