32 J. L. LECONTE. M. D, 



is obtutse and impressed or channeled : in the 9 the la^t ventral is nicked 

 at the tip. and a little smaller than the last dorsal. The form of body 

 is elongate-oval, or so'metimes rather broadly oval. 

 Broader oval, protboi'nx l)lac'k and pal,e; elytra co.state; ventral segments entirely 



Waek 2. 



Elimgate-oval : jimtliorax. last dorsal and last two ve)itral segiiients yellow. 



Length S.j mm. X. Mex. ; Colo flaTiCOllis Lee. 



2. — Antennal third joint Itnt little longer Hum wide; elytra with obsolete costa^; 



prothorax with disc and margins hlaek, remaining parts rosy and yellow. 



Length 12— Ifi mm. Vane; Or.; Cala californica Motsch. 



a. — Much smaller; 8.5 mm. : Or. 

 Antennal third joint longer than wide; elytra strongly costate: prothorax 



with disc and margins black, remaining parts rosy and yellow; varies 



greatly in size and form :' Atlantic slope COri'USCa Fain-. 



Ti/pe. — Moderately large and wide ; size 13. .5 by (S.4 and liy 4 mm. Mass. ; 

 Colo.: Va. 



a. — Small and ))road; O- •'^'''^" '' ^'y "^-^ mm.; auiumnalis Mels. 



/i. — 8naall and narrow; % ^ ; size 7.5 by '^ mm.; lacustris Lee; (in one 

 .sjiecimen from Slave Lake the elytral costte are o])solete) ; L. Suj). ; 

 II. B. Terr. 



FYROPYGA Motseli. 



Antennae rather wide, compressed, more or less serrate, second joint 

 transverse, one-third as long as the third. Last dorsal % 9 Inoadly 

 truncate with rounded angles ; segments lobed at the sides, with the 

 angles but feebly produced backwards. Form elongate-oval, narrow, 

 light organs inconspicuous except in luteicoUis. 



The si^ecific distinctions are sometimes very indetiiiite. ;iii(l de]>eiid on 

 slight antennal characters as in Plateros. 



A. — Antenna' ))road, sub.serrate, third joint slu)rter than tuurtb : last dursal and 

 last two ventral segments yellow; last dorsal % almost rounded at tij). 



Black, prothorax and .scutel yellow, the former narrowed in front, ajiex acutelv 



rounded. Length S mm. Fla luteicollis Lee. 



B, — Antenniv nairnw, nul sciTatr, third jnint longer than fourth, last dorsal 

 broadly truncate. 



Protliorax witli black disc and edges; elytra lilack 2. 



Prothorax witli black disc and reddish-yellow sides 3. 



2.— Elytra costate; ().5— S mm.: Pa.? L. Sup.; Colo.; Cala...feiiestrali!l$ Mels. 



Elytra not costate: 4.5— 6 mm.; Can.; Mass.; Pa. Va nigricans Say. 



3. — Elytra black; antenupe less slender, joints one-half longer than wide; 5 — 



7 mm.; X. Y. ; Tex.; Ariz.; Fla — .-. «lecipiens Harris. 



Elytra black or i)ieeous; antenna> narrower, joints twice as long as wide; 



4 mm.; X. J.; Fla niinuta Lee. 



Elytra piceous, witli jiale mai-gin and narrow sutural line: — 7 mm.: Detroit, 

 Mich.; Lake Tahoe, Cala indicta n. sj). 



P. indicta. — Elongate, i)iceous, niargins of ventral and pectoral .segments 

 paler: prothorax wider than long, nearly semicircular, apical and lateral margin 

 pale, nairowly reflexed and punctured; hind angles acute; disc convex, feeblv 



