NO. II LARVAE OF THE ELATERID BEETLES GLEN 53 



length of coxa; with 6 to 9 spinehke setae on medioanterior surface; 

 6 to 9 such setae and i fine seta scattered on posterior surface ; 2 

 well-developed setae on medial aspect. Femur usually with 6 to 10 

 spinelike setae on medioanterior surface ; 5 or 6 spinelike setae and i 

 slender seta on posterior surface; i, rarely 2, long seta on medial 

 aspect; i or 2 fine setae on lateral surface. Tibiotarsus with 5 or 6 

 setae around distal margin; 3 to 5 spinelike setae and one slender 

 seta on medioanterior surface; 3 to 5 spinelike setae on posterior 

 surface. Ungula, when uneroded, about as long as tibiotarsus. 



First to eighth abdominal segments subequal ; first segment shortest ; 

 fourth to sixth segments widest. Mediotergites with small, shallow 

 punctures, becoming denser from first to eighth segment ; impressions 

 not conspicuous, very small on first segment ; transverse branch 

 slightly sinuate, on second to eighth segments extending one-eighth to 

 one-sixth distance from longitudinal branch to middorsal suture; 

 longitudinal branch of impression extending from one-half to three- 

 fifths distance from transverse branch to posterior transverse row of 

 setae, longer on more posterior segments. Anterior part of medioter- 

 gite without setae, except for an extremely minute seta sometimes ob- 

 servable near medial end of impression; 2 semipaired setae along 

 lateral margin, just anterad to middle of segment; posterior part of 

 mediotergite, with transverse row of 6 setae, arranged as 3 pairs, 

 sometimes i or 2 very small setae close to the paired hairs. Latero- 

 tergite I extending length of segment; with i to 3 setae. Spiracular 

 sclerite small, subovate, becoming longer and narrower in the more 

 posterior segments; in the eighth segment very little wider than 

 spiracle, but about 3 times as long; always in anterior half of seg- 

 ment. Spiracles subequal in length, in extreme posterior part of 

 spiracular sclerite. Pleurite large, subovate or subtriangular, with 

 3 or 4 setae. Sternum of i piece, subquadrate, narrower opposite 

 pleurite; with 4 faint longitudinal impressions, a lateral pair and a 

 paramedial pair which meet posteriorly ; bearing up to 12 setae, mostly 

 near margins of sclerite. 



Ninth abdominal segment (fig. 16, a), exclusive of urogomphi, 

 as long as, or slightl}^ shorter than, eighth abdominal segment and 

 four-fifths as wide; four-fifths as long as wide; sides of anterior 

 half subparallel, posterior half tapering caudally, making width at 

 anterior margin of caudal notch about three-fifths to two-thirds great- 

 est width of segment. Dorsum convex anteriorly, flattened pos- 

 teriorly; sloping downward from front to back. Dorsal plate (dpla) 

 irregularly lined and wrinkled ; densely punctulate ; 4 faint longitudinal 



