BATRISINI 247 



under the old generic name of Batrisus, a genus unknown in the western 

 hemisphere and, as at present restricted, limited to four species. This is of 

 interest since the great genus Batrisodes, although abundant in the United 

 States, is unknown from Mexico southwards and Raffray, in erecting Iteticus, 

 states that the latter replaces Batrisodes in the neotropics. If this is true, and 

 the morphological differences between these two genera are not great, then 

 there is a gap between Batrisodes and Iteticus of over 4000 miles. Iteticus is 

 quite isolated in the neotropical batrisines by the key characters, especially 

 the well developed dorsal stria on each elytron. This latter structural feature 

 separates the genus at once from the three arthmioid genera and the peculiar 

 Oxarthrius. Iteticus is quickly distinguished from Batrisodes by having the last 

 segment of the maxillary palpi regularly ovoidal, only slightly elongated and 

 slightly subacute at apex, and not much wider near middle than at base, and 

 in having lateral margins as described in the generic key; whereas Batrisodes 

 and the specialized Batoctenu^ have the lateral margins of the first several ter- 

 gites clearly formed by both an internal and an external carina, and the last 

 segment of the maxillary palpi is wider at base and with a much more acute 

 apex. 



The following key to species has been based on the 1897 key of Raffray 

 with recent work integrated to bring our knowledge up to date : 



Key to the Males of Iteticus 



Head and pronotum cribrate, the punctures coarse and very crowded ; 



3 mm semipunctatus 



Head and pronotum not cribrate 2 



2. Vertex with a median longitudinal carina, this carina may be strong 



or weak but is never broken up 3 



Vertex with no median longitudinal carina, but in some species there 

 are several, more or less irregularly separated points or cusps which 

 may appear as an interrupted carina 4 



3. Intermediate trochanters armed near the middle with a short, blunted 



spinoid tubercle; posterior trochanters armed at middle with a 

 tubercle shaped like a toad-stool fungus, being basally columnar 



and apically flattened and expanded princeps 



Intermediate trochanters armed at middle with a long, strong, erect, 

 pointed spine; posterior trochanters armed near base by a thick, 

 short, blunt horn longispina 



4. Anterior tibiae simple 5 



Anterior tibiae inflated at middle of internal face, and notched apically, 



this incisure being pubescent and terminating in a minute spur just 

 before the apex ; 2.7 mm laeviceps 



5. Intermediate trochanters simple; posterior trochanters apically ex- 



tended, with a very long, obtuse tooth; 3.6 mm imperialis 



Intermediate trochanters armed with a tooth, spine or tubercle 6 



