TENEBRIONID^E 75 



9 



and strongly retractile, usually almost or quite hidden under the 

 mentum, the latter always clearly separated from the closed 

 mandibles 5 



Ligula larger, tumid, angularly incised; mentum always separated from 

 the closed mandibles, generally also leaving the maxillary cardo in 

 considerable part exposed 10 



5 Last joint of the maxillary palpi small in both sexes, as in the pre- 

 ceding genera, and never larger and scalene in the male; body 

 roughly and irregularly sculptured but only occasionally coated 

 with earth}' matter 6 



Last joint of the maxillary palpi large and scalene in the male, smaller 

 and recti-triangular in the female; prosternum deflexed; body di- 

 versely sculptured though generally clean, very much larger in size. . 7 



6 Trochantin minute; prosternal process deflexed between the coxa?; 

 head and prothorax relatively small; antennae and tarsi slender; 

 elytra with anastomosing ridges, rather widely inflexed beneath. 

 [Type Asida anastomosis Say]. (Ologlyptus Lac.) Pactostoma 



Trochantin well developed; prosternal process porrect; head and pro- 

 thorax relatively large; body very convex, generally roughly and 

 unevenly sculptured, the elytra narrowly inflexed beneath; antennae 

 and tarsi stout. [Type Microschatia incequalis Lee.].. . Pycnonotida 



Trochantin, antennae, tarsi and prosternal process nearly as in Pycnono- 

 tida; mentum broader, extending beyond the sides of the buccal 

 opening anteriorly; labrum much more deeply sinuate; body less 

 convex, smoother, the elytra with nearly regular rows of coarse 

 punctures, sometimes sulcate. [Type M. punctala Sol.]. 



Microschatia 



7 Tarsi with short and inconspicuous spiniform hairs beneath 8 



Tarsi with very long, decumbent and conspicuous fulvous pubescence 

 beneath 9 



8 Base of the prothorax broadly bisinuate; elytra each with two dis- 

 tinct and subequal disca! costse. [Type Pelecyphorus sordidus Lee.]. 



Glyptasida 



Base of the prothorax truncate or arcuato-truncate, the basal angles more 

 or less acute and prominent but more minutely and less posteriorly 

 so than in Glyptasida, the head and prothorax generally smaller 

 relatively, giving the body a markedly different habitus; elytra 

 each with a single distinct discal ridge, the inner ridge of the pre- 

 ceding genus obsolescent. [Type P. mexicamis Sol.]. (Philolithus 

 Lac.) Pelecyphorus 



9 Body more elongate and subcylindric-oval, more nearly as in Eu- 

 schides, the sides of the prothorax broadly, angularly dilated and 

 reflexed, in a manner wholly peculiar; mentum large and subquadrate 

 as in the two preceding genera; elytra without marked ridges. 

 [Type Pelecyphorus elatus Lee.] Gonasida 



10 Prosternum deflexed posteriorly between the coxae 1 1 



Prosternum porrect and prominent posteriorly 20 



II Last joint of the maxillary palpi large and scalene in the male, 

 smaller and recti-triangular in the female 12 



