NO. II LARVAE OF THE ELATERID BEETLES GLEN I45 



seta at each corner. First prementum with i large seta just caudad to 

 base of each palpus. Labial palpus with basal joint at least one-half 

 length of first prementum, longer than wide, without setae, with 5 or 6 

 pores ; terminal joint about one-half length and less than one-half 

 width of basal segment, without setae, usually with i pore. 



Prothorax nearly equal to combined length of mesothorax and 

 metathorax ; wider posteriorly ; slightly wider than long. Tergites 

 slightly rugose, with few small and very shallow pits ; anteriorly with 

 2 pairs large setae (on each side of median dorsal suture) in trans- 

 verse row ; posteriorly with 4 prominent setae in transverse row, only 

 2 most medial setae paired ; glabrous elsewhere. Episternum with i 

 large seta. Epimeron bearing i small seta. Presternal area consist- 

 ing of 3 sclerites as follows : A small posterior median sclerite, ante- 

 riorly attenuate; 2 large subtriangular lateral sclerites (sometimes 

 partially fused) striate on anterolateral aspect, with i stout seta later- 

 ally and a diagonal row of 4 or 5 minute setae on anteromedial aspect. 

 Eusternum small, usually with narrow medial sclerite. Sternellum 

 and poststernellum indefinite, small, membranous. 



Mesothorax and metathorax each about twice as wide as long. 

 Mediotergites with few small and very shallow pits ; transverse branch 

 of impression reaching about one-fourth distance from longitudinal 

 branch to middorsal suture ; longitudinal branch of impression short. 

 Anterior part of each mediotergite with i or 2 minute setae laterad to 

 impression. Posterior part of mediotergite with 4 conspicuous setae 

 in transverse row, only the 2 most median setae paired. Anterior 

 laterotergite subtriangular, one-half as large as subovate posterior 

 laterotergite. Episternum bearing from 2 to 6 short spinelike setae. 

 Eusternum without transverse row of setae. 



Legs rather short, strong. Coxa with up to 25 spinelike setae on 

 anterior aspect, mostly in 2 oblique rows diverging mesally with 

 conspicuous glabrous area between rows ; 7 to 8 stout setae on poste- 

 rior surface. Trochanter with 10 to 12 spinelike setae on medio- 

 anterior surface, arranged in 2 rows ; 6 to 9 such setae and i fine seta 

 scattered on posterior surface ; 2 well-developed setae on medial aspect. 

 Femur usually with 9 to 11 spinelike setae on medioanterior surface ; 

 4 to 6 spinelike setae and i slender seta on posterior surface ; i long 

 seta on medial aspect ; i or 2 fine setae on lateral surface. Tibio- 

 tarsus about as long as femur, but narrower ; with 5 or 6 setae around 

 distal margin ; 4 spinelike setae and i slender seta on medioanterior 

 surface ; 3 or 4 spinelike setae on posterior surface. Ungula, when 

 uneroded, almost as long as tibiotarsus. 



