NO. II LARVAE OF THE ELATERID BEETLES GLEN 2/ 



longitudinal branch to middorsal suture, slightly shorter on first seg- 

 ment; longitudinal branch (loim) running parallel to lateral margin 

 of sclerite, extending from one-half to three-fourths distance from 

 transverse branch to posterior transverse row of setae. Anteriorly 

 on each mediotergite i fine seta near medial end of impression and 



1 small seta between end of impression and middorsal suture ; some- 

 times a few minute setae scattered anterad to and mesad to impres- 

 sion. Posteriorly on each mediotergite, 3 pairs of long setae (only 



2 pairs on first segment) forming transverse row, sometimes also i or 

 2 unpaired minute setae. Laterally, with i very small seta ( frequently 

 wanting) near posterior end of impression, and 2 (rarely 3 or 4) 

 unpaired setae laterad to impression. Laterotergite I {Itg I) large, 

 elongate, extending length of segment ; heavily sclerotized ; bearing 

 4 or 5 setae, 3 or 4 near dorsal margin and i near point of articula- 

 tion with laterotergite II. Laterotergite II {Itg II) small; indis- 

 tinctly defined and variable ; articulating with anteroventral aspect 

 of laterotergite I and extending forward to near anterior border of 

 segment; glabrous. Spiracular sclerite (spsc) small, subovate, sit- 

 uated in anterior half of segment between mediotergite and lateroter- 

 gite I; surface somewhat elevated just anterad to spiracle. Spiracles 

 (sp) bifore, subequal in size; widest anteriorly; situated in posterior 

 half of spiracular sclerite. Tergal and pleural areas separated by 

 dorsopleural fold (dplf). Plcuritc (pi) large, subovate, somewhat 

 attenuate posteriorly ; in posterior half of segment ; strongly sclero- 

 tized ; bearing 4 setae, one much longer than others ; becoming grad- 

 ually smaller from first to eighth segment. Sternum (st) usually of 

 I piece, large, subquadrate, with faint longitudinal striations on 

 posterior margin; with 2 faint anterior impressions (ini) meeting 

 mesally, and 2 prominent lateral impressions sometimes (especially 

 on first abdominal segment) separating off laterosternites (ist) ; 8 to 

 14 setae, mostly around margins. 



Ninth Abdominal Segment (figs. 6, d; 7, a, d), exclusive of 

 urogomphi, about as long as eighth abdominal segment and four- 

 fifths as wide; three-fourths as long as wide; sides of anterior half 

 subparallel, posterior half tapering caudally, making width at anterior 

 margin of caudal notch from two-thirds to three-fourths greatest 

 width of segment. Dorsum convex anteriorly, flattened posteriorly; 

 sloping downward from front to back. Dorsal plate (dpla) irregu- 

 larly lined and wrinkled; with small punctures (like pin pricks) 

 sometimes increasing in size and density anteriorly ; 4 shallow longi- 

 tudinal impressions, 2 laterally (lini) and a paramedian pair (pirn) 



