694 The American Naturalist. [July, 
LIST OF THE SPECIES OF SUB-FAMILY LAMPYRID&, 
Head more or less covered by the hood-like thorax ; 
antennz not plumose : 
Head completely covered ; 2d joint of antennz small ; 
transverse ; 
Antennal joints very broadly compressed ; color 
black ; sides and apical margin of thorax ful- 
vous, .28-.44 ins, 
Antennal joints not broadly compressed ; 
Eyes small; color black; thorax fulvous, with 
disk and sides black; last dorsal segment in 
male rounded, .28-.54 ins, 2. Ellychnia corrusca. 
Eyes small ; last dorsal segment in male bisinuate 
and truncate ; 
Prothorax with black disk and reddish yellow 
sides, .2 3. Pyropyga nigricans. 
Prothorax vim black disk and edge, ut ins. 
4. Pyropyga decipiens. 
Eyes large; prothorax subcarinate ; aves with 
wide side margin ; 
Elytra black, margin and suture yellow ; thor- 
ax like No. 2, .30-.50 ins. 
I. Lucidota atra. 
yractomena angulata. 
Eyes large; prothorax not carinate ; elytra with- 
out wide margin ; 
Larger species; female elytra long like male, 
:36-.52 ins. 6. Photinus pyralis. 
Smaller ge: female wingless, elytra short, 
.22-.32 in 7. Photinus scintillans. 
Head only Re covered ; 2d joint of nans 
not transverse, as long as 3d. 
Color dull yellow; prothorax red on disk, with a 
dark medial stripe, elytra dull yellow, more or 
less striped with black, .42-.60 ins. 8, Photuris pennsylvanica. 
Head exposed ; antennæ plumose ; 
Elytra subulate, color testaceous, .50 ins. 9. Phengodes plumosa. 
The length of the insect in 1ooths of an inch is indicated before the 
name. The species numbered 4 and 5 are northern insects and rare 
with us, and No. 9 is, as stated above, a southern species. The light 
organs are more feeble in ı to 5, and more strongly developed in 6 to 
8, which are the common “ fireflies.” 
