TENEBRIONID.E 165 



small, sparse and obsolescent externally, more distinct and irregular 

 suturally; abdomen shining, somewhat strongly but finely, con- 

 fusedly creased; legs moderately long, slender. Length (9) 22.0 

 mm. ; width 10. ^ mm. Kansas facilis n. sp. 



There are many forms in southeastern Arizona allied to obovatus, 

 and they are rather confusing, but with prolonged study, begetting 

 more intimate familiarity, the separation of the species and sub- 

 species finally becomes much less uncertain, and in fact, as they are 

 now arranged in my cabinet, there would scarcely seem to be any 

 great amount of error. Nitidipennis and gliscans probably are 

 species different from obovatus. In one of the specimens of con- 

 vexus before me there is a rather notable deformation of the right 

 antenna, in which the outer joints are much shorter than those of 

 the left antenna, the tenth joint being a rounded solid mass which 

 includes the eleventh, the true spongy apex of the tenth being evident 

 only in outer half of the width at about the middle. 



Heterasida n. gen. 



In general facies and many features of its organization this genus 

 differs very markedly from any of the preceding and is indeed wholly 

 isolated in the Asidini. The antennae form one exception in the 

 tribe in having the entire periphery of the apex of the tenth joint 

 spongy-pubescent, and the nature or disposition of the vestiture 

 is also to a greater or less degree peculiar. The type of elytral 

 costulation is approached elsewhere only in Asidina, so far as noted. 

 In the structure of the head and eyes, labrum, prosternum and some 

 other general characters it does not differ essentially from Euschides 

 and many other generic groups, but the fourth palpal joint is not 

 large and scalene in the male but small and recti-triangular, as in 

 all the following genera from this point in the series, and the anterior 

 tibiae much more nearly resemble those of Pelecyphorns, differing 

 greatly from Euschides in being more cylindric, with the outer angle 

 at apex barely at all everted or acute; the tarsi are spinulo-setose 

 beneath. The mentum is very moderate in size, obtrapezoidal, 

 mounted upon a high gular pedestal and does not quite attain the 

 sides of the buccal opening even anteriorly; the acutely pointed sides 

 of the opening are much prolonged and well developed when com- 

 pared with some other genera, such as Glyptasida and Pelecyphorus, 



