TrecJiina.] ADKPiiArsA. 123 



Patrohua and Pogrmvs again resemble the Bemhidia in having the apiral 

 edge of the ligula unisetose, Avhile Aiqms and Pcrilcpfus ditfer from that 

 genus (with wliich in many ways they are so closely connecteil) l)y 

 having this part phirisetose, in which point they resemble Trechus. 

 Dr. Horn divides the tribe, which he names Pogonina, as follows : — 



Terminal joint of palpi more or less cylindrical and obtvise at tip, that 



of tli(i libial palpi as long as the preceding Pogoni. 



Terminal joint of palpi slender, acute at tip, that of the labial palpi 



shorter than the preceding Trechi. 



This division, however, will not hold good, as the comparative length 

 of the terminal and penultimate joints of palpi is very variable, especially 

 in Pogonus ; they may, perhaps, be classed as follows: — 



I. Ligula plurisetose in front. 



1. Apical joint of all the palpi much shorter than penul- 

 timate, which is dilated Group AEPYES. 



2. Apical joint of maxillary palpi about as long as penul- 

 timate, which is not dilated Group TltECUI. 



II. Ligula unisetose iu frout Group FUGOSI. 



As, however, these characters are somewhat obscure, the more obvious 

 characters that separate the genera belonging to the groufts (wliieh are 

 re.spectively Aepiis and Perilejjtus, Tredius, and Pogonus and Palwbus) 

 are here given in a combined table. 



I. Lateral margin of elytra not prolonged at base from 

 shoulder to scutcUuui; upper side of tarsi not longi- 

 tudinally furrowe<l. 

 i. Elytra separately rounded, about as long as the head 



and thorax combined ; apex of abdomen exposed . . Ai:rus, <Srt)n. 

 ii. Elytra jointly rounded, longer than head and thorax 

 combined ; apex of abdomen completely covered. 



1. Sutural stria recurved at apex TeecqUS, Claim. 



2. Sutural stria not recurved at apex. 



A. Elytra pubescent ; maximum size 3 mm. . . Perileptus, "ScAauffi, 



B. Elytra smooth ; minimum size about 7 mm. . Patkobcs, Dij. 

 II. Lateral margin of elytra prolonged at base from 



shoulder to scutellum ; upper side of tarsi longitudinally 



furrowed PoGONUS, Dej. 



PERZXiZiPTUS, Schaum. {Blcmus, Daws.) 



This genus is intermediate between the Trechina and the P.embidiina: 

 in the form of the ]>alpi it much resembles BemOu/iian, but at the same 

 time the terminal joint, although very short in comparison with that of 

 Tree// us, is considcralily longer than it is in Beuddilnun, and iu the 

 formation of the ligula (which is plurisetose in front) anil paragluss.u 

 it more nearly approaches Trednts : on tlie other hautl it dillers from 

 the latter genus and resembles the former in the fact that the sutural 

 stria of the elytra is not recurved at apex, and it closely rcseuibh-s 

 Li/mnc'U}//, which is now very often classed with Bnidddiuin, in the 

 fact that both se.xes have the penultimate joint of the anterior larsi 



