Dec, 1 916.] New Species of Elaterid^. 257 



This species differs from peregriniis in more elongate form, 

 shorter second and third antennal joints, finer and sparser punctua- 

 tion and hind angles of prothorax distinctly divergent. 



Aptopus rugiceps new species. 



Elongate reddish brown ; antennae and legs slightly paler ; pubescence 

 short, yellowish grey. Head very densely and rather coarsely punctate, punc- 

 tures partly confluent ; antennae reaching far beyond the basal angles of pro- 

 thorax ; third joint equal, or very nearly so, to the fifth joint. Prothorax 

 subquadrate ; sides without acute margin, slightly arcuate to a little before 

 basal angles, the latter not, or extremely feebly, divergent ; basal angles 

 ebly carinate, the carina not acute ; surface densely punctate, with vmiform 

 and moderately large punctures. Elytra about two and one half times as long 

 as the prothorax at base ; sides feebly arcuately narrowing to apex ; striae 

 moderately coarsely punctate ; intervals convex and sparsely and finely punc- 

 tate. Prosternum closely punctate ; propleura very densely subconfluently 

 punctate ; metasternum densely punctate ; abdomen more finely punctate. 

 Length 8 mm. 



Huachuca Mts., Arizona (Schaeffer). 



Ther differences between this species and peregrinus are slight 

 consisting only in generally larger size and coarser, denser punctua- 

 tion of head, prothorax and propleur?e. 



Elater sanguinicollis new species. 



Red ; head, scutellum, elytra, prosternal spine, meso- and meta-sternum 

 and coxal plates black. Head rather densely and moderately coarsely punc- 

 tate. Antennae reaching not quite to the hind angles of prothorax; not 

 strongly serrate, joints slightly longer than wide; third joint not triangular 

 and as long or nearly as long as the fourth joint. Prothorax not coarsely 

 nor densely punctate, punctures as usual stronger at apex and sides ; hind 

 angles not bicarinate ; pubescence red. Elytra with scarcely impressed striae, 

 the punctures moderate; intervals nearly flat and subrugosely punctate; 

 pubescens short, black. Length 7.25 mm. 



Beaver Valley, Utah (Doll & Engelhardt). 



This species is best placed with coUaris and allies, though the an- 

 tennal joints, especially the outer are slightly longer, than in that 

 species. In Lecorite's table^ it would go near ncvadensis from which 

 it differs in having a red abdomen, black pubescence of elytra and 

 pale antennae. 



1 Trans. Am. Ent. Soc, XH, 10. 



