l64 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



mediotergites with fine scattered punctures, and with transverse 

 branches of impressions reaching about four-fifths of the distance 

 from the longitudinal branches to the middorsal suture. 



Material used in study. — Thirteen examples were examined, in- 

 cluding the larval exuviae of three reared specimens. All material 

 was from Saskatoon, Saskatchewan, and is now in the Canadian 

 national collection. The reared adults were identified by W. J. Brown, 

 of Ottawa. Notes follow on the reared material. 



6; Saskatoon, Saskatchewan; July 13, 1935; i reared to adult July 30, 193S ; 



R. Glen. 

 7; Saskatoon, Saskatchewan; July 21, 1937; 2 reared to adults Aug. 3, and 

 Aug. 20 ; R. Glen and H. McDonald. 



THE LIMONIUS CANUS GROUP 

 Figures 10, e; 11, g; 31, b, c, f; 32 

 PROVISIONAL KEY TO SPECIES ^^ 



1. From eastern North America, including the Great Lakes region 2 



From western North America, including the Great Plains region 3 



2. Abdominal mediotergites (fig. 32, c) with impressions extending to or 



nearly to the middorsal suture on second to fifth segments; New 



York to Indiana dubitans LeConte 



Abdominal mediotergites with shorter impressions ; eastern Canada and 



fectypus (Say) (?) (= 

 northeastern United States -l agonus Say) 



[anceps LeConte ( ?) 



3. Urogomphi with outer prongs hook-shaped {opr, fig. 31, /; eastern 



Washington, and Idaho to northern California, .subauratus LeConte (?) 

 Outer urogomphal prongs not hook-shaped (fig. 32, e, f) 4 



4. Abdominal mediotergites with impressions (as in fig. 32, c) extending to 



or nearly to the middorsal suture on second to fifth segments 5 



Abdominal mediotergites with shorter impressions ; British Columbia and 



the Pacific States canus LeConte 



5. From Manitoba, Saskatchewan, and Alberta 



Limonius sp., near ectypus ( Say) 



j~. ^, Ti -n fcalifornicus (Mannerheim) 



From the Pacific area I -^ ^ ,• X j /^n 



\ occidentalis Candeze (?) 



The larvae of eight North American species have been included 

 in this group. Of these, L. canus LeConte and L. dubitans LeConte 



^3 Since this study was completed, H. P. Lanchester has published a paper 

 containing a key to the larvae of six species of this group : "Larval Determina- 

 tion of Six Economic Species of Limonius," Ann. Ent. Soc. Amer., vol. 39, 

 pp. 619-626, 1946. 



