NO. II LARVAE OF THE ELATERID BEETLES GLEN 25 



ranged as 3 pairs with i unpaired seta farther laterad ; usually with- 

 out setae between anterior and posterior rows, sometimes i seta, 

 rarely 2, near center of sclerite. Episternum (epst) large, anteriorly 

 reaching sides of presternum ; bearing 3 or 4 prominent setae and a 

 few smaller hairs. Epimeron {epin) consisting of faintly striated 

 membrane with small, narrow sclerite extending backward from point 

 of articulation with episternum, bearing i to 3 small setae. Presternal 

 area (prst) large, sclerotized, triangular, posteriorly acute; consist- 

 ing of four sclerites as follows : A small posterior median sclerite, 

 anteriorly attenuate; 2 large subtriangular lateral sclerites, striate on 

 anterolateral aspect, with i stout bristle (sometimes also i small seta) 

 laterad to center and a row of 5 minute setae or pegs on antero- 

 medial aspect ; and a very narrow, median, anterior piece, sometimes 

 fused with lateral sclerites. Eusternum (eust) small, membranous or 

 faintly sclerotized, bearing 2 tiny setae mesally; furcae (situated 

 internally between bases of coxae) small, f ureal pits shallow. Sternel- 

 lum (stl) and poststernelhim (pstn) indefinite, small, membranous. 



Mesothorax {II, fig. 5, a, b) about twice as wide as long. Medio- 

 tcrgites (nitg) with posterior margins membranous and longitudinally 

 striate ; slightly rugose, with scattered small, shallow pits ; transverse 

 branch of impression (trim) reaching from one-eighth to one-fifth 

 of distance from longitudinal branch to mediodorsal suture; longi- 

 tudinal branch of impression (loim) very short or wanting. Anterior 

 part of each mediotergite with 2 to 4 unpaired setae (most lateral 

 usually longest) forming transverse row, with i seta within impres- 

 sion, I laterad to impression, and i or 2 between impression and 

 mediodorsal suture; sometimes several minute hairs scattered across 

 sclerite anterad to transverse branch. Posterior part of each medio- 

 tergite with transverse row of 4 conspicuous setae, arranged as 2 pairs 

 (sometimes with i small seta near more lateral pair). Lateral part 

 of mediotergite with i pair of large setae between anterior and 

 posterior rows. Posterior laterotergite (Itgp) large, subovate, in 

 posterior half of segment, bearing i large seta anterad to center. 

 Anterior laterotergite (Itga) well developed, subtriangular, one-half 

 as large as posterior laterotergite; closely applied to anterolateral 

 margin of mediotergite; i small seta ventrally; spiracle (sp) bifore, 

 larger than spiracles in abdominal segments, broadest anteriorly. 

 Episternum (epst) subtriangular; bearing several minute setae and 

 armed along ventral margin with up to 10 spinelike setae, usually with 

 6 to 8. Epimeron (epm) as on prothorax, but usually with i or 2 

 more setae posteriorly. Presternal area (prst) transverse, convex 



