THE LO.MMroRXED WOOD-IiOKIXfJ BEETLES. 



1071 



and elytra each with punctures and elevations as In quadrigibbus, from 

 which it is separated mainly by characters given in key. Length 10- 

 13 mm. 



Crawford and Posey counties; scarce. July 2-July 5. Occurs 

 on the trunks of white oak trees. 



A. morrisii Uhler is known from Missouri, Pennsylvania and 

 Canada. 



LVII. Leptostylus Lec. 1852. (Gr., " slender + point.") 



Oblong, rather robust species, closely related to the next, but 

 differing by having a very obtuse tubercle on the side of thorax a 

 little behind the middle: presternum broad and channeled; meso- 

 sternum broader than long, more or less emarginate at tip and 

 slightly dilated behind the coxae ; antenna; less slender and shorter 

 than in Liopus, the outer joints becoming rapidly shorter than the 

 third and fourth ; first joint of hind tarsi not longer, if as long, as 

 the next two. Four species have been taken in Indiana, while three 

 others may occur. 



KEY TO INDIANA SPECIES OF LEPTOSTYLUS. 



a. Elytra without small elevations bearing short black scale-like hairs. 



b. Elytra slightly truncate at tip ; prosternum as wide between the 



coxas as the width of a coxal cavity. 1979. macula. 



bb. Tips of elytra separately rounded; prosternum narrower than a 

 coxal cavity; thorax rather densely punctured on flanks as well 

 as disk. collaeis. 

 (id. Elytra with small tubercular elevations, each bearing on its summit 

 short, black, scale-like hairs. 



c. Thorax densely punctured ; elytra with densely placed coarse, deep 



punctures. 1980. sexguttatus. 



cc. Thorax not densely punctured; elytra 1 punctures not closely placed, 

 often inconspicuous or concealed ; legs not hairy. 

 (1. Surface of thorax even, not tuberculate. regularly punctured. 

 e. Elytra very indistinctly punctured, especially at apex, the disk 

 with an angulate white band behind the middle, the tips feebly 

 and obliquely truncate. biustus. 

 ee. Elytra distinctly punctured over the entire surface, the tips 

 slightly prolonged, not obliquely truncate. 1981. parvus. 



(Id. Surface of thorax more or less tuberculate. the punctures irregu- 

 larly placed and rugose. 

 /. Antennie in both sexes longer than body: elytra feebly or not 

 roughened with acute tubercles. plaxidorsus. 

 ff. Antennae scarcely longer than body, even in male, the third joint 

 distinctly longer than fourth ; elytra with acute tubercles or 

 ridges. 1982. aculiferus. 



[68—23402] 



