AMERICAN COLEOPTERA. 217 



The above description, measurements and habitat apply to the 

 typical form, which as indicated is black or very nearly so. A few- 

 individuals have been seen with rufopiceous thorax, while others 

 are entirely brown ; these latter are perhaps immature. With the 

 type form I have thought best to place several others which differ 

 from it and from each other in a most puzzling way. I have little 

 doubt that one or more good species are represented, but the number 

 of specimens is as yet hardly sufficient to establish the constancy 

 of the small differences noted, and their tabulation would now be 

 difficult. For the sake of a more definite cabinet arrangement by 

 those who have sufficient material the following subspecies may be 

 recognized : 



Arizoitense var. nov. — A small series collected by Hubbard or 

 Schwarz at Oracle and Bright Angel, Arizona, differs from the type 

 form in being of a uniform brown color; the head more coarsely 

 reticulate-punctate, and the eyes a little larger and less widely sepa- 

 rated. The length is uniformly very nearly 2 mm. 



Bicolor var. nov. — Size small (1.3-1.5 mm.), dull black above, 

 rufous beneath. Here again the eyes are relatively larger in both 

 sexes than in typical bistriatum. This form is apparently confined 

 to subtropical Florida (Key West, Cedar Keys, Biscayne and Cap- 

 ron),and all specimens are from the Hubbard and Schwarz collection. 



Debile var. nov. — Very small (1.1-1.5 mm.). Pale brown, more 

 slender and parallel than in any other form known to me. The 

 cephalic reticulation is very coarse. Specimens here referred are 

 from " Florida ; " Pensacola, Florida ; " Georgia ; " " Texas ; " 

 Goliad, Texas 



6. P. hriniiM'iiiPi Horn. 



Brown, stouter than bistriatum and more pubescent. The punc- 

 tures of the elytral series are fine and nearly disappear at the mid- 

 dle ; the interspaces are almost invisibly confusedly punctulate. 

 There is only a faint trace of the median posterior metasternal sul- 

 cus, distinct in all our other species. In this latter respect brun- 

 neum is like the Mexican apicalis of Pic, in fact the two species are 

 exceedingly similar in other respects. 1 am unwilling to unite them 

 on the basis of the single example of apicalis sent me by M. Pic. 



Lower California. San Jose del Cabo (type); Santa Rosa, two 

 examples sent me by Mr. Beyer. 



TRANS. AM. ENT. SOC. XXXI. (28) JULY, 1905. 



