THE GENUS DENDROCTONUS. 131 



Type labeled "Type No. 7452 U.S.N.M.," name label, "Hopk. 

 1/22/08, Picea engelmanni, Capitan, N. M., W. F. Fiske, collector, 

 ?, Hopk. U. S. 3958." 



Male type: Length 5.5 mm. Front without anterior line. Elytra 

 with striae less distinctly impressed and interspaces less convex than 

 in female: declivity convex, with strise and strial punctures obscure; 

 interspaces flat, shining, finely but distinctly punctured and without 

 granules except on vertex. 



Type labeled, " $ type," name label, "Hopk. 1/22/08, Picea engel- 

 manni, Capitan, X. M., W. F. Fiske, collector, $', Hopk. U. S. 3958." 



Variations. The length varies from 5 to 7 mm., with the average 

 at about 6.5 mm. The color ranges from uniform light to dark red 

 and black, to black head, thorax, and abdomen, and red elytra. The 

 sculpture ami vest it lire of the epistoma vary as usual, with the 

 greatest variation in size, color, and punctures. 



Distinctive characters. The characters which serve to distinguish 

 this species from the one preceding are the larger average size, 

 slightly more elongate form, more shining elytra, with the lateral 

 strijp somewhat less impressed, the punctures usually coarser, and the 

 interspaces less acutely rugose. It is more closely allied to D. obesus, 

 from which it is distinguished by the commonly darker prothorax, 

 and more distinctly impressed lateral strise of the elytra, with coarser 

 punctures. 



Revisional notes. This species, like the preceding, has been involved 

 in the confusion in revisions and collections under D. rufipennis. 

 The species under this name was represented in the Le Conte collec- 

 tion by two specimens labeled "Alta, Ut." and "Colo.," by two in 

 Horn's collection labeled "H. B.," and "Alta, Ut.," and by one 

 specimen from Doctor Dietz, labeled "Ut." These were doubtless 

 involved in Le Conte 's and Dietz's revisions. 



Pupa. In addition to the generic, divisional, and subdivisional 

 characters, the apices of the front and middle femora are smooth; ab- 

 dominal tergites 2 to 6 with small pleural spines; 1 and 2 without 

 dorsal but with lateral spines, and 3 to 6 with dorsal and lateral spines; 

 7 and 8 smooth; 9 with pleural spines, as usual. Pupal type labeled 

 "Webb Xo. 2." 



The usual variation in minor details prevails, but the pupa of this 

 species is distinguished from that of the preceding one by the more 

 distinctly impressed vertex of the head, the generally coarser spines, 

 and the presence of dorsal spines on the third abdominal tergite. 



Larva. In addition to the generic, divisional, and subdivisional 

 characters, the front has a transverse rugose elevation situated near 

 the middle; the anterior surface, including the elevation, is opaque; 

 the area behind the elevation is impressed and shining, clypeus 



