THE FIREFLIKS "i: LIGHTNIXG BUGS. S'2\ 



]\rarshall and Orange counties; rare. ^lay 'iS— June 10. A spe- 

 cies of wide distribution, but everywliere nmch li's> common than 

 angidala. 



1501 r482fi). PYE.\CTOiiE>;.\ LiciFKRA Mplsli.. rroe. 'Phil. Acad. Xat. Sei.. 

 II. 1S45. ;;(i4. 

 Kloiii^Mte, narrow, imrallel. ('ulors as in iniiiiihitd e-KC-ept that tlie dusky 

 s|iot on marLTins of thora.x is mure distinct, and occurs only on middle third 

 of the margin. Yellow margin of elytra much narrower and more parallel 

 than in nnniiJutu. Male with ventral segments 1^ piceous, seventh with 

 a piceons spot : female with fifth and sixth also piceous at middle. Length 

 >-14 mm. 



Lake and Kosciusko counties: s'-aree. -Tune 3-June 24. Prob- 

 ably tliroughoitt the northern half of State. 



XI. Photixus Lap. Ib-^'Z. (Gr., "shining.") 



Hood-like thorax not at all carinate, usually slightly grooved 

 and more obttisi'ly rounded in front. The light (ircans are always 

 the larger in the male, where they occupy all the ventral segments 

 behind the third or fourth and are accompanied by stigmatic pores 

 on the fifth and sixth segments. In the female they occur on the 

 middle part of the ^■•^lltral ^cameuts. but the stigma-like impres- 

 sions are barely or imt visible. Five have been taken in Indiana, 

 while one other perhap-; occurs. 



KEV TO i:<DI-iXA SPECIES OF PIIOTIXtS. 



a. Fourth ventral segment dark. 



6. Thorax with .i black strij* and two roseate simts; elytra with wide 



side margins. 1562. coxsaxguixeus. 



}ih. Thorax with a dusky cloud or black spot; elytra with narrow side 



margins ; form more narrow. 



c. Thorax with hind angles ;icute. somewhat produced, its disk 



smooth, margins punctate. I."ii3. akdexs. 



cc. Thorax with hind nnjcles not pnicluced, its disk finely, margins 



densely and rather coarsely, punctate. puxctulatxs. 



au. Fourth ventral segment pale, at least in part. 



(1. Large species ( or more mm. i ; disk of thorax roseate with a large 

 black spot: ventral impressions i.f male very distinct. 



l."ir;4. pvKALi.s. 

 (?(/. Small species (less than s mm.) ; ventral impressions of male obso- 

 lete. 

 c. Elytra pale, widely margined : female with long elytra and wings. 



1565. MAKfilXEELUS. 



cr. Elytra dusky with pale margins, narrowly margined; female with- 

 out wings, elytra short, widely separated at suture. 



1")66. St IXTII.LAXs. 



