H. C. FALL. 161 



Hind femur with a tooth on both inner and outer margins. 



Group III. 

 Hind femur mutic ; antennae pectinate or flabellate in the d 1 . 



Group IV. 



Hind femur with one tooth only, on inner margin Group V. 



Hind femur with one tooth, and one or more commonly two denti- 

 cles Groups VI-VII. 



Hind femur with one tooth and three denticles Group VIII. 



Hind femur with one tooth and four denticles Group Villa 



Hind femur with a few small denticles only Group IX. 



Group I. 

 This Group includes only two species pisoriun and rufi- 

 manus, the former the well-known cosmopolitan pea weevil, 

 the latter first recorded by Horn as having been reared from 

 pea pods imported from Switzerland. I have seen no native 

 specimens of rutimanas, and do not know whether the species 

 has become established with us. The two species are closely 

 allied and are briefly separated by Horn thus : 



Thorax behind lateral tooth sinuate rufimaiius Sch. 



Thorax behind lateral tooth not sinuate pisorum Linn. 



Only a single Italian specimen of rufimaiius is before me, 

 but judging from this the above distinction is not very 

 marked, and I would suggest the following : 

 Tooth of hind femur ill-developed, femora (except at base) and tibiae of 



the anterior legs rufous rufimanus. 



Tooth of hind femur long and acute, front tibia; and apical portion of 



middle tibiae rufous pisorum. 



Horn says that the middle tibiae of the male are more or 

 less arcuate and with a small acute tooth on the inner mar- 

 gin near the tip. I find in males of pisorum that the middle 

 tibiae are distinctly sinuate internally, the external margin only 

 slightly arcuate, and the inner apical angle with a moderately 

 long spur. I do not detect any tooth on the inner margin 

 near the tip, and unless Horn's statement applies to rufi- 

 manus alone, it is seriously lacking in precision. 



Group II. 



The following species agree in having the disk of the pro- 

 thorax uneven, though very variably so. Mimus differs 



TRANS. AM. ENT. SOC, XXXVI. (21) JULY, 1910. 



