NO. II LARVAE OF THE ELATERID BEETLES GLEN 187 



not punctured, impressions indistinct, and prominent setae unpaired. 

 Abdominal pleurites {pi, fig. 39, d) large, sterna {st) undivided. 



PROVISIONAL KEY TO SPECIES OF HYPNOIDUS 



1. From North America 2 



From Europe maritimus Curtis 



2. Mandible (fig. 39, g) usually with about 5 or 6 fine denticles at base of 



retinaculum musculus (Eschscholtz) 



Mandible (fig. 39, c) usually with about 2 fine denticles at base of 

 retinaculum dubius ( Horn) 



Material used in study of the genus. — Reared adults of H. dubius 

 (Horn) and H. musculus (Eschscholtz) were identified by W. J. 

 Brown, of Ottawa. 



H. dubius (Horn) : Six specimens from Saskatoon, Saskatchewan, 

 were examined, including the exuvium of one reared specimen. 

 (C.N.C). 



i; Saskatoon, Saskatchewan; May 27, 1924; adult emerged June 25, 1924. 

 K. M. King. 



H. musculus (Eschscholtz) : Four larvae were studied. These were 

 collected by T. Kincaid from Popoff Island, Alaska, and were the 

 specimens upon which he based his description. An adult which was 

 reared from a larva apparently collected at the same time and place 

 is in the U.S. National Museum, but the associated larval skin could 

 not be found. 



H. maritimus Curtis : Six larvae from Austria were examined. 

 These were identified through field association with adults of this 

 species. However, the larvae show typical Hypnoidus characters and 

 there is good reason to believe that the identification probably is 

 correct. (Canadian national and British Museum collections.) 



Genus EANUS LeConte 

 Figure 40, a-c 



Species of Eaniis are commonly recorded in the European literature 

 under the generic name Paranomus Kiesenwetter. 



Larvae of this group inhabit the litter of the northern and alpine 

 forests and are probably chiefly predaceous. E. decoratus has been 

 reared from Quebec and larvae have been collected as far west as 

 Saskatchewan. According to Brown (1930, p. 163) adults of this 

 species are known from the Gulf of St. Lawrence to Alaska. A larva 



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