NO. II LARVAE OF THE ELATERID BEETLES GLEN 69 



short, sometimes lacking) and 2 unpaired setae farther dorsad, the 

 more lateral of the unpaired setae is definitely more anterior than the 

 paired hairs ; i or 2 additional tiny setae sometimes present. Eye spot 

 black, well defined, ovate or circular; surrounded by 3 or 4 promi- 

 nent setae. Postgenal areas expanded mesad but always rather widely 

 separated ; glabrous. 



Gula short; narrowed slightly by converging postoccipital sutures, 

 but of good width; glabrous. 



Antenna (fig. 17, b) with first joint weakly clavate, usually at 

 least five-sixths as wide as long; without setae; 2 or 3 small pores. 

 Second joint subcylindrical, as wide as long; one-half to three-fifths 

 length of basal joint; i or 2 pores; a few small "sensory" pegs and 

 setae borne distally; i large conical "sensory" appendix (sap) just 

 ventrad to base of third joint. Terminal segment small, as long as 

 second joint, but only one-quarter to one-third as wide ; 4 or 5 setae 

 on apex. 



Mandibles of moderate length, robust; about five-sevenths as wide 

 at base (ventral aspect) as long; retinaculum well developed; peni- 

 cillus sometimes reaching base of retinaculum. Distal half inward 

 bending ; pointed ; outer surface convex with short, moderately deep 

 dorsal groove ; inner face slightly excavate with small median carina, 

 ventral margin of inner face sharp and slightly convex ventrally, 

 dorsal margin sharp and strongly convex dorsally. 



Ventral mouthparts from two-thirds to three-fourths as wide 

 across bases of stipites as at anterior ends of stipites. Cardines well 

 separated. Stipes large, only two-thirds as wide posteriorly as an- 

 teriorly ; proxistipes and dististipes not distinct ; usually 5 to 8 promi- 

 nent setae on antero-latero ventral aspect. Galea 2- jointed ; basal 

 joint subcyUndrical, rather indefinite, shorter than terminal joint, 

 without setae or pores; terminal joint narrower than basal segment, 

 outer margin longer than inner margin, with 2 to 4 pores on latero- 

 ventral aspect. Maxillary palpi with all joints subcylindrical. First 

 joint twice as wide as long; distally on mesoventral surface with 

 group of 2 or 3 small pores and 2 setae, i or 2 pores near midventral 

 aspect. Second joint wider than long; as long as first joint or slightly 

 longer and at least two-thirds as wide ; without setae ; with i or 2 

 pores. Third joint wider than long; about one-half length of second 

 joint; bearing 2 pores ventrally; distally with whorl of 4 or 5 fine 

 setae; sometimes also i or 2 small "sensory" pegs distally. Fourth 

 joint longer than wide; longer than third joint; one pore laterally 

 and sometimes i minute seta near middorsal aspect. Postmentum 

 with I long seta at each corner, i smaller seta short distance anterad 



