84 MEMOIRS ON THE COLEOPTERA 



rarely any suspicion of darker femora, this being shown very well 

 by a correspondingly complete series of texanum before me. It is 

 rather beyond doubt that picipes is a species related to optatum, 

 platynoides and merens, rather than to texanum, histricum and mill- 

 tare. If the elytra in militare are really in any way alutaceous, as 

 stated in my original description, this would proclaim it as a very 

 isolated species in the subgenus Peryphus, and I fear therefore that 

 the description may be faulty in this respect. 



The species optatum, merens and sedulum, described above, belong 

 to the platynoides subsection, but platynoides Hayw., is a larger and 

 flatter species, the types of which were found near the source of the 

 Kern River in southern California; optatum, which seems to ap- 

 proach it more closely than any other of the three, is fully as convex 

 as striola, and in fact has the normal convexity of the entire tetra- 

 colum or ustulatum section. 



The varietal forms of scopulinum, near its southern limits in 

 New Mexico, are very puzzling and would require large series for 

 proper study; it is a peculiarly northern type, as is also bimacula- 

 tum Kirby. My two specimens of the latter, from New Mexico, 

 may not be perfectly typical, though fitting the description of Hay- 

 ward, who probably had typical specimens before him, and espe- 

 cially in the very small head. Renoanum is certainly a different 

 though related species, differing in color, in the larger head and much 

 more prominent eyes. Sordidum Kirby, said to be identical with 

 birnaculatum by Mr. Hayward, I do not know. 



The Mexican species described under the name submaculatum by 

 Bates (Biol. C.-A, I, i, p. 149) is apparently very closely allied to 

 consanguineum Hayw., and the two may be identical; vernale Bates 

 (1. c.), however, also seems closely allied. Lucidum (1. c.), is given 

 by Mr. Bates as a new species, the reference to LeConte's descrip- 

 tion having been inadvertently omitted. 



For much the same reason that led me to adopt the name nitens 

 above, instead of grapei, I would recommend the adoption of Say's 

 name tetracolum, instead of ustulatum, although retaining the latter 

 as a group name. The fact that besides tetracolum we have a num- 

 ber of closely related though distinct taxonomic modifications, 

 shows that the tetracolum type has been very long established in 

 America, and the probabilities therefore are that no one of our re- 



