1913] Wiekham — New North American Elateridce and Scarabaeidce 27 



NEW NORTH AMERICAN ELATERIDM AND 

 &CARAB.EIDM. 



By H. F. Wickham, 



State University of Iowa, Iowa City. 



Limonius venablesi sp. no v. 



Finely pubescent, slightly shining. Form moderately elongate for this genus, 

 sides subparallel for the greater part of the length. Black, with a slightly greenish 

 tint, the tibiae and tarsi picescent, knees testaceous, elytra testaceous, each with two 

 black spots, the anterior of which lies slightly in front of the middle and is nearly 

 circular in outline, while the posterior is a little postmedian in position and elliptical, 

 these markings being about equidistant from the side margin and the suture. Head 

 with strong frontal concavity, the margin weak and obsolete at middle, only slightly 

 reflexed and scarcely emarginate the punctuation strong, deep, and close. Anten- 

 nae (male) rather weakly serrate, the second and third joints subequal and together 

 about as long or a little longer than the fourth which, in turn, does not differ much in 

 length from those succeeding. Prothorax punctured similarly to the head but more 

 closely at the sides, where there is a tendency to confluence, width equal to about 

 five-sixths of the length, sides (in the male) nearly parallel except at the extreme base 

 and apex, front angles rather prominent anteriorly and deflexed, hind angles rather 

 long, a little divergent and blunt or rounded at the tips, indistinctly unicarinate. 

 Scutellum finely punctured. Elytra subparallel at sides to about the apical third, 

 thence rounding to the apices which are simple. Surface with distinct moderately 

 impressed striae which are marked with coarse approximate punctures, the inter- 

 spaces slightly convex with close, irregular, more or less confluent but rather fine 

 punctuation. Under side of body closely and finely punctured, the protboracic 

 flanks more roughly than the trunk and abdomen. Length, 8.50 mm. 



The type is a male, collected at Vernon, B. C, May 14, by 

 Mr. E. P. Venables, after whom it is named. I have had it in my 

 collection for three or four years. A female from the same source 

 differs in having the prothorax more narrowed anteriorly and the 

 antenna? a trifle shorter. In the type, the antenna? pass the apices 

 of the prothoracic hind angles by the length of two joints. With 

 the British Columbian specimens, I associate, as cotypes, three 

 examples taken by Mr. W. M. Mann at Pullman, Wash., though 

 two of these latter are much larger and have relatively somewhat 

 shorter antenna?. The largest of the Pullman specimens is about 

 14.60 mm. long, but the smallest scarcely exceeds the measurements 

 of the type. 



