68 GEO. H. HORN, M. D. 



Among the characters used in the foUowing- tables and descrip- 

 tions one requires special mention. In Col. Hefte xii, 1874, p. 15, 

 Harold makes use of the " accessory spinule of the middle and pos- 

 terior tibite" in separating groups of species. This spinule is a pro- 

 longation of the ai)ical margin of the middle and posterior tibiae on 

 the under side adjacent to the spurs. There is no difficulty in de- 

 tecting it after a few observations. 



Since the publication of the synopsis in 1871, a few species have 

 been described by Baron Harold, and some new forms have been 

 gradually accumulating in my cabinet. In the succeeding pages, 

 among the new species, two only are described from uniques, — m- 

 sculptus and Iceviventris ; of the old species ohlongus, lucanus and 

 puncticoUis remain unique. 



The following table will assist in the determination of the species. 

 In some instances it has been made unusually full from the difficulty 

 in recognizing the species in some i)arts of the series. 



Clypeus subangulate, sumetimes denticulate each side of tlie median emargiua- 



tion 2. 



Clypeus feebly emarginate, the angles each side broadly rounded 5. 



2. — Marginal line of posterior femur deep and entire 3. 



Marginal line very short or absent 4. 



3. —Posterior tibia without accessory spinule ; front not rugulose at sides. 



Surface subopaque ; first joint of posterior tarsus very much, nearly twice, 



longer than the long spur iii!«culptus. 



Surface shining ; first joint of posterior tarsus not longer than the long spur. 

 Thorax densely punctured from apex to base; intervals of elytra sub- 

 acutely carinate cyliiiclrus. 



Thorax nearly smooth in front, coarsely, less densely punctured poste- 

 riorly; intervals nearly flat Leeuiitei. 



Posterior tibia with accessory spinule; front rugulose at sides ; elytra sub- 

 oval, intervals subcostiform lucauusii. 



4. — Posterior tibia without accessory spinule. 



First joint of posterior tarsus as long as the long spur; species piceous or 

 nearly black. 



Thorax densely punctured from ba.se to apex abdittlS. 



Thorax densely punctured near base, almost smooth in front. 



texauus. 

 First joint of posterior tarsiLS shorter than the long spur and evidently 

 thicker near apex ; ferruginous or brownish species. 

 Thorax coarsely, sparsely and irregularly punctured, with finer punc- 

 tures intermixed; abdomen with very few punctures (lesertlis. 



Thorax closely and regularly punctured, a little more finely in front; 



abdomen coarsely punctured iiiops. 



Posterior tibia with accessory spinule; thorax as in desertus; abdomen 

 smooth, without punctures Iseviventrris. 



