(Page 484) 

 Elytra with less dense, and not rugulous or confluent punctation. : 28. 



27. Head peculiarly small, scarcely broader than pronotum, and much 



narrower than elytra; these considerably longer than pronotum, 



which is without groove in middle-line. L. 3.5-4 mm 



19. St. incrassatus Er. 



Head about as broad as elytra; these hardly longer than pronotum, 

 which as a rule has a feeble, often indistinct groove in mid- 

 dle-line. L. 3.5-4 mm 20. St. buphthalmus ^ravh. 



28. Forehead between the eyes entirely flat, without distinct grooves. 



Pronotum with a fine, thorough groove in the middle-line. ... 29. 

 Forehead between eyes with two more or lees distinct longitudinal 

 grooves, separated by a convex interval. Pronotum either with- 

 out groove in middle-line or the groove is abbreviated 30. 



29. Thorax rather dull, very densely punctated, with distinct whitish- 



gray hair. L. 3.5-4 mm 21. St. canaliculars Jyllh. 



Thorax rather glistening, less densely punctated, indistinctly 

 haired. L. 3.5-4 mm 22. St. nitens Steph. 



30. Grooves of forehead flat or rather flat, interval feebly convex. ..31. 

 Grooves of forehead deep with almost carina-f ormed interval. 



Pronotum with sparse punctation. L. 3.5-4 mm 



27 . St. melanopus Steph. 



31. Forehead between eyes broadly impressed, its grooves very feeble 



and their interval scarcely convex. Abdominal foremost free 

 dorsal joints with very indistinct, almost obliterated cari- 

 nae. L. 3-3.5 mm 23. St. morio iravh. 



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