Ilarpalimt.'] adepitaga. 25 



system of parallel tribes, wc need not lose sight of their afTmities to the 

 true water beetles. 



The following are the chief divisions of the TTarpalinse : — 



I. Elytra not truncate at apex .'.... Intruncatipennes. 



II. Elytra truncate at apex, or subtruncate 'I'kuxcatipennes. 



INTRUXCATIPENNES. 

 The group in which the elytra are not truncate at apex comprises five 

 great subdivisions ; for help with regard to them, more especially with 

 regard to the covering of the soles of the anterior tarsi of the male, I am 

 much indebted to the kindness of Mr. Bates. 



i. DiVERSiMANi. Male with the anterior tarsi differing in the various species as 

 regards the number of joints dilated, the solos of the dilated joints clothed with 

 fine short erect hairs. 



ii. Patellijiam. i\Iale with the first two or three joints of tlie anterior tarsi 

 dilated either square, transrerxe-oblong, or rounded, the soles clothed with fine 

 short erect hairs : the first joint is sometiuies rounded triangular. 



iii. Quaduipalmati. Male with the first four joints (occasionally joints 2-4) of the 

 anterior tarsi dilated, the soles of the dilated joints clothed with biseriate squama) 

 or with fine short erect hairs ; intermediate tarsi often dilated as well. 



iv. Tkipalmati. Male with the first three joints of the anterior tarsi dilated, 

 cord'iform or emarginate, the soles clothed with squama?. 



V. Bipalmati. Males with the first two joints of the anterior tarsi dilated (occa- 

 sionally in certain Tachys quite simple), the soles almost always clothed with 

 squama?, iu one or two cases, e.g. Tachypus, pilose. 



Sub-Div. i. Diversimani. 



This division is established by Bates (Biologia Centrali- Americana, 

 Carabida?, p. 39), where he says, "This new subdivision is here j)roposed 

 for tlie reception of the Broscidce group of authors, which differs from 

 all other aggregates of genera by the great diversity in the form and 

 number of the dilated joints of the male tarsi, the palms of the same 

 ])eing invarialjl}^ clothed with a smooth brush of hairs. Xot only are 

 the tarsi of the middle as well as of the front pair of legs sometimes 

 dilated (gen. Ccificeiius, Cerotalls, and others), but the number of dilated 

 joints varies from species to species, and in some members of the typical 

 genus (Brosais) is reduced to two on the anterior tarsi only ; and again 

 species occur in which the male tarsi are simple like the female. This 

 peculiarity sulliciently distinguishes the subdivision from the equivalent 

 groups of the same rank {Pattllimani, &c.), and the position of the sub- 

 division at the commencement of the second great section of the Cara- 

 bidiB, which I now adopt, is sufficiently indicated by the occurrence in 

 one or other of the genera of minor characters distinctive of the first 

 great section — for instance, the glaln'ous surface of tlu; four basal joints 

 of the antenna?, a character which does not reappear henceforward in the 

 long series of forms belonging to the second division of this great 

 family." 



BROSCINA. 



The division Diversimani is hardly reijuired for our fauna, as we ojdy 



