THE FIREFLIES OR LIGHTNING BUGS. 



813 



1541 (4788). Eros mundus Say, Bost. Journ. Nat. I Msi.. I. L835, 155 ; ibid. 



II, 633. 



Resembles the preceding but much smaller and with under side of 

 body red or scarlet; antennae black, the two basal joints scarlet; ventral 

 segments and tarsi often dusky. Length 6 mm. 



A species of southern range described by Say from Posey 

 County. Taken by Bury near Cincinnati ; not represented in the 

 collection at hand. 



1542 (4789). Eros sctlptilis Say. loc. cit. 150; ibid. IT, G33. 

 Elongate, slender, subdepressed. Black 



or piceous ; thorax reddish-yellow, usually 

 with a blackish spot on disk. Antennas elon- 

 gate, slender, third joint but little shorter 

 than fourth, second minute, about one-third 

 the length of third. Front middle cell of tho- 

 rax quadrate, carinate ; hind middle cell nar- 

 row. Elytra each with four strong discal 

 costaa; the lateral edge and sutural line 

 raised ; intervals each with a double row of 

 alternating irregular cells. Length 5-7 mm. 

 (Fig. 314.) 



Vigo and Posey counties; scarce. 

 June 3- June 22. Beaten from leaves of Fig. 3i4. (Original.) 



hickory and iron weed. 



1543 (4790). Eros humeralis Fab., Syst. Eleut, II, 1801, 111. 



Resembles thoracicus in color, but distinguished by having six cells 

 on thorax, the middle front one with sides indistinct but with a strong 

 central carina ; hind middle cell narrow like a channel ; second joint of an- 

 tenna? more than half as long as third. Length 8-10 mm. 



Lake. Kosciusko and Posey counties: rare. May 2 8- June 3. 

 Described by Say from Posey County under the specific name 

 obJiquus. 



1544 (4791). Eros trilixeatus Melsh.. Proc. Phil. Acad. Nat. Sci., II. 



1845, 303. 



Elongate-oblong, depressed. Black or piceous. often with a rusty or 

 reddish-brown tinge; sides of thorax dull yellow. Walls of front row of 

 thoracic cells obliterated, only the median carina remaining ; hind row of 

 cells consisting of a very narrow median and two large lateral ones, the 

 latter defined in front by the usual oblique transverse ridge, which is not 

 complete. Elytra each with three costa?; the lateral edge and suture raised, 

 the usual first costa of disk indistinct ; intervals each with a double row 

 of quadrate cells. Length 5-7.5 mm. 



Jackson. Crawford and Posey counties; scarce. June 24- 

 July 20. 



