THE FIREFLIES OR LIGHTNING BUGS. 



if. Elytra finely or sparsely rugose-punctured. 



g. Legs piceous or dull yellow; length 4.5-0 mm. 



1588. RECTUS. 



gg. Legs bright yellow. 



h. Black ; thorax and base of antennae orange yellow, the for- 

 mer often with a black dorsal line. 1589. flavipes. 

 hh. Piceous; thorax and margins and suture of elytra yellow. 

 i. Thorax wider than long. 

 ./'. Form slender; thorax but little wider than long, its 

 sides nearly parallel ; elytra usually pale with dusky 

 stripes. 1590. scitulus. 



././'• Form more robust; thorax one-half wider than long, 

 its sides rounded. 1591. luteicollis. 



ii. Thorax not wider than long, sides subsinuate ; elytra 

 piceous with narrow pale stripes. 1592. pusillus. 

 bb. Tarsal claws unlike; the outer claw of all the tarsi toothed at base, 

 entire at tip, the inner claw simple. 

 /.-. Eyes large and prominent ; size larger, 12-14 mm. ; thorax not wider 

 than long. rotundicollis. 

 Ick. Eyes smaller, not prominent; size less, not over 7 mm.; thorax 

 wider than long. 

 Z. Thorax yellow with a broad black dorsal stripe. 



1593. TUBE RC U LAT U S . 



II. Thorax reddish-yellow with two oblong-oval blackish spots. 



1594. BILINEATUS. 



W. Claws of tarsi simple, slender, not toothed or cleft ; thorax semiorbicu- 

 lar. with a dorsal black stripe. 1595. simpliunguis. 



1584 (4920). Telephorus dentiger Lee, Proc. Phil. Acad. Nat. Sci., V, 



1851, 341. 



Elongate-oblong, rather robust. Dusky black, clothed with fine grayish 

 pubescence ; thorax yellow with a transverse angulated central dusky spot ; 

 mouth and side margins of abdomen, and sometimes the margins of elytra, 

 dull yellow. Head and elytra densely and roughly punctured. Thorax 

 more sparsely and coarsely punctured, median impressed line distinct, front 

 angles broadly rounded. Length 8-9 mm. 



lake, Wayne and Marion counties; scarce. May 6-May 28. 



1585 (4927). Telephorus excavatus Lee, loc. eit, 342. 



Elongate, slender. Black ; thorax reddish-yellow with a narrow dorsal 

 black stripe, this sometimes wanting ; narrow side margins of elytra, tibiae, 

 tarsi and basal third of .antennae, sometimes dull yellow. Head finely and 

 densely punctured. Thorax as long as wide, nearly smooth, slightly nar- 

 rowed in front, sides straight, excavated about the middle ; median line wide 

 and deep, channel-like ; thorax of female wider and less excavated at sides 

 than in male. Length 5-0 mm. 



Throughout the State; frequent. May 11-June 25. 

 1580 (4932). Telephorus carolinus Fabr., Syst. Eleut, I, 1801, 290. 



Elongate, robust, subdepressed. Black, finely pubescent; thorax red- 

 dish, with a large shining black spot at center ; mouth parts, three basal 



