820 FAMILY XL. TAMPYKID.K. 



1558 (4820). PYROPYGA DECIPIENS Harris, Trans. .Hartford Soc., 1836, 74. 

 Elongate-oval. Black or rusty black ; thorax with a wide pale reddish- 

 yellow margin. Antennae less slender than in the other two species, the 

 joints one-half longer than wide. Elytra each with two subobsolete costse 

 and with surface more coarsely granulate than in nigrk-aiis. Length 5- 

 7 mm. 



Northern half of State; frequent. .June 17- July 2-i. 



X. PVKACTOMENA Lee. 1851. (Gr., "to set on fire.") 



Antemuv narrow, not serrate; the thorax snbcarinate with sides 

 broadly reflexed. Light organs are \vell developed in both sexes; 

 those of the male being located on the fifth and sixth ventral seg- 

 ments and marked each side about half way between the middle and 

 side by a large round stigma-like pore or spot; those of female are 

 at the sides of the segments, which an- dusky or piceous at middle, 

 and are also accompanied by distinct pores. The males have the 

 last dorsal segment emarginate, seventh ventral truncate, and the 

 eighth small. Three of the four known species have been taken 

 in the State. 



KEY TO INDIANA SPECIES OF PYRACTOMENA. 



a. Elytra with wide side margins. 1559. ANGULATA. 

 aa. Elytra with narrow side margins. 



ft. Antennas shorter than thorax. 1560. BOREALIS. 



lili. Antenna 1 longer than thorax. 3561. LCCIFERA. 



1559 (4823). I'YI;A( TOMKNA ANGULA'I A Say, Junrii. 1'hil. Acad. Nat. Sri.. V. 



1825, 162; ibid. II, 273. 



Elongate, depressed. Blackish-brown; tlurax with a 

 dark median space and dusky lateral margins, between 

 \vliirli the area is yellow tinged with reddish on basal half; 

 elytra with suture and narrow side margins pale. Thorax 

 with front margin obtusely angulate. Elytra finely granu- 

 late, not punctured, each with two or three well marked 

 Fio . :nr . u rosta 1 . Ventral segments of female dull yellow spotted with 

 (After Knobel.) dusky. Length 8-15 mm. (Fig. 317.) 



Throughout (he State; frequent. May 10 -Inly 8. One of our 

 most common HreHies. 



1560 (4824). PYRACTOMENA BOREALIS Hand.. Bosf. Joiirn. Nat. Hist., II. 



1838. 16. 



Resembles mii/iilata closely in form and general appearance. The mar- 

 gins of both thorax and elytra are narrower and those of the former are 

 yellow instead of dusky as in rinr/iildln. The i-enlral black spot is usually 

 smaller and (he red one each side larger. Antenna- stout and shorter than 

 thorax. Abdomen of female in great part dark. Length 10-15 mm. 



