NO. II LARVAE OF THE ELATERID BEETLES GLEN IO9 



longitudinal impressions to middorsal suture; longitudinal branches 

 short, with i large seta (sometimes also i small seta) at posterior ends. 

 Posterior part of each mediotergite with transverse row of 7 or 8 

 conspicuous unpaired setae. Lateral part of each mediotergite with 

 3 or 4 large setae. Anterior laterotergite subtriangular, one-half as 

 large as subovate posterior laterotergite. Mesothoracic spiracles small, 

 but slightly larger than spiracles in abdomen. Episternum without 

 spinelike setae. 



Legs subequal in length. Coxae of prothoracic legs with about 12 

 spinelike setae on each anterior surface, up to 17 such setae on coxae of 

 mesothoracic and metathoracic legs ; sometimes i stout seta and a few 

 fine setae on posterior surface. Trochanter with 4 to 6 spinelike setae 

 on medioanterior surface ; 2 or 3 such setae and i fine seta on posterior 

 surface ; 2 long setae on medial aspect. Femur longer than trochanter 

 and as wide; with 6 to 8 spinelike setae on medioanterior surface; 

 I to 3 spinelike setae and i slender seta on posterior surface ; i long 

 seta on medial aspect ; distally with i or 2 fine setae on lateral surface. 

 Tibiotarsus with 6 setae around distal margin ; 2 or 3 spinelike setae 

 and I slender seta on medioanterior surface ; i or 2 spinelike setae and 



1 slender seta on posterior surface. Ungula, when uneroded, about 

 three- fourths as long as tibiotarsus ; base well expanded mesally, with 



2 fine setae arising mesally from small proximal sclerite. 



First to eighth abdominal segments subequal; first segment prac- 

 tically as long as others ; all segments about twice as wide as long ; 

 third to fifth segments widest. Mediotergites (nitg, fig. 22, /) with 

 scattered minute punctures ; transverse branches of impressions (trim) 

 reaching to middorsal suture on second to eighth segments, only about 

 half as long on first segment ; longitudinal branches of impressions 

 (loim) extending almost to posterior transverse row of setae. Each 

 mediotergite with about 15 to 18 unpaired setae, arranged as pos- 

 terior transverse row of about 12 setae (6 or 7 conspicuous), with 3 

 to 6 setae along lateral margin of sclerite. Laterotergite I bearing 3 

 to 5 setae. Spiracles small, subequal ; spiracular sclerite small, ovate, 

 usually just anterad to middle of segment. Pleurite well developed, 

 subovate, slightly diminishing in size from first to eighth segments ; 

 posteriorly with 2 or 3 setae in transverse row. Sternum of i piece ; 

 subquadrate, narrower posteriorly ; bearing about 8 setae. 



Ninth abdominal segment (fig. 22, d), exclusive of urogomphi, 

 slightly longer than eighth abdominal segment and three-fourths as 

 wide ; three-fourths as long as wide ; widest anteriorly ; width at an- 



