224 



J J. Metasterniim with a 

 distinct ridge on each 

 side between coxae. 

 K. Elytra densely clothed hiseriatus 

 KK. Elytra with much 

 of their surface 

 glabrous. 

 L. Elytra with soft 

 white scales con- 

 densed to form 

 transverse mark- 

 ings h'ifasciatus 



LL. Elytra without such 

 markings. 

 M. Size, less than 



5 mm punctirostris 



MM. Size, more than 



9 mm foveipe.nnis 



Notes on Table. 



AAA. The dentition is very feeble in imitafor, especially on the 

 four hind femora. 



B. Some of the other interstices have this peculiar appear- 

 ance, but it is more conspicuous on the ones mentioned. 



?'. The sides of the segments are UiSually densely, or at least 

 irregularly, punctured. 



Q. On densely squamose species, such as lafprarius, this 

 character is not at once apparent, but on looking at the elytra 

 from behind, the row^s of larger scales are quite distinct. 



DD. This character is not always to be relied upon, but it is 

 a very useful feature, and notes are given on the species in which 

 it is known to vary. The episternum shortly before its front 

 i/riangular extension is narrowed and punctures are absent from 

 the narro^vest portion. In the other species, although the 

 punctures are frequently denser at the ends, at least one row is 

 traceable at the narrow- part. 



E. On hifasciafus the punctures are in irregular semi-double 

 rows for the greater portion of these segments, but on the median 

 fifth they sometimes appear to be in single rows. 



G. The punctures on the basal half of the elytra are always 

 large, but on melanterioides they are quite unusually so. 



H. This is more conspicuous on the male than on the female; 

 it has nothing to do with the acute ridge betw^een the coxae, the 

 apex of which from some directions may appear to be tuberculate. 

 On fovetpennis a vague remnant of it is traceable. 



JJ. On the majority of species of the genus there is a strong 

 oblique ridge on each side of the metasternum between the coxse. 

 It was not found advisable, however, to use the character as a 

 main feature of the table, as the gradations between acutely 

 elevated and absent are numerous. When the metasternum is 

 examined from the side, there is a line whence the surface appears 

 to slope do'wn to the margin on one side, and on the other to the 

 middle, and this line may appear to be somewhat like a ridge, but 

 the ridges referred to in the table are distinct and rather narrow 

 ■elevations above the surface. 



