THE LEAF BEETLES. 



1165 



elytra elongate, parallel, distinctly margined at sides, the epipleurae 

 narrow; color in our species brown with dull yellow stripes; tarsal 

 claws of males narrowly bifid at tip, of females more broadly bifid 

 behind the tip. Three species have been taken in the State, while 

 another perhaps occurs. 



KEY TO INDIANA SPECIES OE TlilRII ABD A . 



a. Thorax more than twice as wide as long; epipleura of female piceous. 



2157. BREVICOLLIS. 



aa. Thorax not twice as wide as long; epipleura always pale. 



b. Elytra very densely and finely punctured, the punctures so dense as 

 to be indistinct as such ; black stripes of elytra united near tips. 

 c. The yellow discal stripe of elytra broader at base, gradually nar- 

 rowed to tip, and extending only three-fourths to apex. 



TO MENTOS A . 



cc. The yellow stripe broad, parallel and entire. 2158. canadensis. 

 ~bb. Elytra closely punctate but the punctures distinctly separated; black 

 stripes of elytra not united near tips. 2159. virgata. 



2157 (6897). Trirhabda brevicollis Lee, Proc. Phil. Acad. Nat. Sci., 1S65, 



221. 



Elongate-oval. Head and thorax dull yellow, the former with a small 

 black spot on vertex ; the latter with three irregular fuscous spots, the mid- 

 dle one often forked or cordate, sometimes wanting ; elytra dull yellow with 

 a common sutural piceons stripe, broad at base and gradually narrowing to 

 apex, each also with a piceous stripe extending from humerus nearly to 

 tip, then curving, and joining the sutural in the male ; antennae piceous, the 

 three basal joints in part pale; femora yellow, tibiae on outer side and tarsi 

 piceous. Thorax with sides obtusely angulate; disk with a rather deep 

 oblique impression each side. Elytra closely and finely punctate. Length 

 8.5-9.5 mm. 



Dekalb, Vigo, Putnam and Marion counties; frequent locally. 

 June 23-September 21. Occurs especially on leaves of prickly ash, 

 Xanth oxylum americamim Mill. 



T. tomentosa Linn., length 8.5-10 mm., occurs abundantly on the 

 Atlantic coast from Long Island to Florida. It is herewith in- 

 cluded as the range of brevicollis was given "Sen coast Florida to 

 Texas," and cne is as likely to occur in Indiana as the other. 



2158 (6892b). Trirhabda canadensis Kirby, Faun. Bor. Amer., IV. 1837. 



219. 



Elongate-oblong, slightly broader behind. Head and thorax dull yel- 

 low, the former with a black spot on vertex; the latter with an oval cen- 

 tral spot and a round one each side; elytra with margins and a broad dis- 

 cal stripe dull yellow, the black stripe on side broader behind the middle, 

 then narrower at apex and incurving to join the sutural ; antennae piceons. 

 the basal joints partly dull yellow ; legs pale yellow, the tarsi dusky. Tho- 



