AMERICAN COLEOPTERA. 37 



PI.EOTOMUS Lee. 



The development of this genus has been traced by Mrs. V. 0. King, 

 Austin, Texas ; and the resuUs of her observation are pubhshed in 

 Psyche iii, 51 — 53. For a good series of specimens I am indebted to 

 Mrs. King and Mr. Belfrage. I have separated the 9 found by Mr. 

 W. 31. Davis in the mountains of Kentucky as a distinct species, on 

 account of the much greater length of the prothorax ; the % is un- 

 fortunately unknown. The light organs are brilliant in the $ , less so in 

 the S . The prothorax is finely carinate and the elytral costae distinct. 

 Prothorax not longer than ■wide, obtusely rounded in front ; % 11 mm. ; 9 ^ ^ uim. ; 



Texas palleiis Lee. 



Prothorax nearly one-half longer than wide, sides obliquely converging, rather 

 acutely rounded in front ,• 9 18 mm.; Cumberland Gap, Ky...Davisiin. sp. 



As there is no other character available at present for the distinction 

 of the second species, a longer description is unnecessary. 



Group 4. — Luciolx. 

 The eyes are large, convex and widely separated above and beneath in 

 both sexes, not conspicuously larger in % ; the head is rounded, narrowed 

 behind and not retractile ; it is but partially covered by the prothorax, 

 which is, however, of the usual hood-like form and rounded in front. 

 The antenna) are longer than one-half the body, filiform, slender, not 

 compressed, inserted near the anterior margin of the front, and moder- 

 ately approximate ; the second and third joints are about equal, and 

 together are as long as each of the following joints. 



The sexes are similar in form with long elytra and well developed 

 wings ; the light organs occupy the whole of the fifth and following- 

 segments ; stigma-like pores are not obvious, being situated at the base 

 of the fifth and sixth segments and less strongly marked than in Pyracto- 

 mena and Photinus % . The seventh ventral in 9 is ojjtusely triangular ; 

 in % the fifth and sixth are broadly emarginate, the seventh is smaller 

 than in 9 , sinuate at the sides and prolonged at the middle, the eighth 

 is a little wider and longer than the prolongation of the seventh. In our 

 species the outer (or anterior) claw is cleft at tip. The prothorax and 

 elytra are densely rugosely punctured, the former is yellow with a black 

 stripe or spot, each side of which the disc is red ; the latter have the 

 whole margin and frequently a discoidal stripe pale. A single genus 

 occurs in our fauna with limited representation. 



PHOTURIS Lee. 

 Prothorax dull yellow, disc red, with a dark inedian stripe; head broadly not 

 deeply concave; labrum tridentate; elytra with a pale discoidal stripe 



10.5-^15 mm.; N. Y. ; Fla. ; Ks pensylvanica. 



a. — Elytra dark, margined with pale, discoidal stripe absent. 



