NO. II LARVAE OF THE ELATERID BEETLES GLEN 1 53 



with I large seta just caudad to base of each palpus. Labial palpus 

 with basal joint cylindrical, about one-half length of first prementum, 

 about as long as wide, without setae, 3 or 4 pores; terminal joint 

 shorter than basal joint and about one-half as wide, without setae, 



1 or 2 pores. 



Prothorax about equal to combined length of mesothorax and meta- 

 thorax ; wider posteriorly ; about as long as wide. Tergites minutely 

 punctulate; anteriorly with 5 setae (on each side of median dorsal 

 suture) in transverse row, arranged as 2 pairs with i unpaired seta 

 between, the unpaired hair often found near the more lateral pair 

 giving appearance of group of 3 setae ; posteriorly with 4 setae 

 in transverse row, arranged as i pair with 2 unpaired setae farther 

 laterad; glabrous elsewhere. Episternum with i large and usually 2 

 smaller setae. Epimeron bearing i small seta. Presternal area con- 

 sisting of I large triangular sclerite, posteriorly acute, striate on 

 anterolateral aspects, i prominent seta near each lateral margin, and 



2 short diagonal rows each of 4 minute setae anteriorly near middle. 

 Eusternum small, membranous, with small narrow median sclerite, 

 Sternellum and poststernellum indefinite, small and largely mem- 

 branous. 



Mesothorax and metathorax each about twice as wide as long. 

 Mediotergites sparsely punctulate ; transverse branch of impression 

 variable in length, commonly extending about one-fourth distance 

 from longitudinal branch to middorsal suture; longitudinal branch 

 of impression very short or absent. Anterior part of each medio- 

 tergite sometimes with several minute setae issuing from punctures; 

 2 or 3 small setae arranged as follows: i just behind transverse 

 branch of impression, i just laterad to impression, and sometimes 

 I near medial end of impression or slightly farther mediad. Pos- 

 terior part of each mediotergite with transverse row of 4 conspicuous 

 setae, the 2 most medial paired ; sometimes i minute seta just caudad 

 to the most lateral of the large hairs. Anterior laterotergite sub- 

 triangular, one-half as large as subovate posterior laterotergite. Epis- 

 ternum bearing up to 10 spinelike setae, usually 6 to 8. Mesothoracic 

 spiracle subequal in size to spiracles in abdomen. 



Legs subequal in length. Coxa of prothoracic leg usually with 

 from 25 to 32 spinelike setae on anterior surface, mesothoracic and 

 metathoracic legs with from 20 to 2'j such setae ; 6 to 8 stout setae 

 and a few finer hairs on posterior aspect. Trochanter with 5 to 8 

 spinelike setae on medioanterior surface; 5 to 7 such setae and i 

 fine seta on posterior surface ; 2 long setae on medial aspect. Femur 



