NO. II LARVAE OF THE ELATERID BEETLES GLEN lOJ 



and transverse branches of impressions {trim, fig. 22, /) reaching to 

 middorsal suture in second to eighth segments; sternum undivided 

 in first 8 abdominal segments ; and anal aperture linear and median. 



Description of larva. — Length 9 mm.; greatest breadth 1,75 mm. 

 on third to fifth abdominal segments. Only one larva was available 

 for examination and its relative maturity is unknown. Body robust; 

 convex dorsally, flatter ventrally; depressed dorsoventrally ; with 

 large membranes on lateral aspects ; all segments broader than long ; 

 head and ninth abdominal segment about three-fifths greatest body 

 width. Dorsum with conspicuous color pattern (fig. 22, /), con- 

 sisting mainly of dark brown patches on pale yellow background, 

 giving superficial appearance of 4 dark longitudinal bands. On 

 first 8 abdominal segments the dark color all lies posterad to trans- 

 verse branches of impressions and mediad to longitudinal branches; 

 on each segment there are 2 subrectangular, paramedian patches con- 

 nected anteriorly with lateral areas of similar pigmentation; remain- 

 ing portions are pale yellow, except for brown, striate posterior margin 

 of mediotergites and light brown area anterad to impressions. On 

 ninth abdominal segment the dorsal plate and urogomphi are dark 

 brown, dorsal plate somewhat paler laterally. On mesothorax and 

 metathorax the dark coloring is less intense than on abdomen, but 

 pattern is similar except laterally where there are 2 or 3 dark spots 

 instead of i large patch. On prothorax the dorsal surface is light 

 brown with somewhat suffused irregular dark brown areas, except 

 for yellow-brown posterolateral patches and narrow medial area. 

 Anterior two-thirds of head dark brown and frons dark throughout. 

 Venter pale, unicolorous, except for dark urogomphi, ventral margin 

 of caudal notch, and ventral mouthparts. Dorsum slightly rugose; 

 sparsely punctulate, punctures most conspicuous on epicranial plates, 

 prothorax, and ninth abdominal segment. 



Head subquadrangular with arcuate sides; flattened above and 

 below. 



Frontoclypeal region extending backward to near foramen magnum, 

 bluntly rounded posteriorly. Nasale unidentate. Subnasale with 

 transverse ridge, ventrally convex, serrate when uneroded, bearing 5 

 subequal, short, sharp, forward-projecting denticles. 



Epicranial plates punctulate. Dorsal sulci each bearing 5 setae, 

 subequally spaced, the most anterior seta long, others small. Two 

 pairs of lateroepicranial setae ; also i seta farther dorsad and i small 

 seta farther anterodorsad. Eye spot black, well defined, ovate or 

 circular, surrounded by 4 or 5 setae, 4 conspicuous. 



Gula elongate, narrowed in middle ; glabrous. 

 8 



