NORTH AMKRICAN HYMENOPTERA. 5] 



1. C'eropaloN bipiinctata Say. 



Ceropales blpniictnta Siiy, Lout's f^ecQxu\ Exped. ii, p. 334, 1824; Cress., 

 Tr. Am. Ent. Soc. i, p. 138, 9 % , 18(i7. 



9 ^. -Black, the posterior femora, except base and apex, reddish; antennse 

 as long as head and thorax; wings brownish, with strong violaceous reflections- 

 the anterior and posterior orbits, the former more broadl.v, separated at the ver- 

 tex, a spot in the lateral angles of the cl.vpeus, a spot on the posterior angles of 

 the metathorax. and a line on scape beneath yellow; the anterior femora and 

 t.bife before ti.iged with rufous; the % has the face, clypeus, labrun. and the 

 scape beneath, entirely yellow. Length 14—1,5 mm. 



Occurs from Canada to Texas. 



2. Ceropales iiigripes Cr. 



Ceropales nigripes Cress., Tr. Am. Ent. Soc. i, p. 139, 9 . 

 9. -Black, subsericeous;. legs entirely black, the tarsi slightly fuscous- an- 

 tenuffi a little shorter than the head and thorax; spot in lateral angle of the 

 clypeu.s. inner orbits, not reaching the top, the posterior orbits very narrowly so 

 spot on scutellum, and posterior angles of the metathorax, whitish yellow' 

 Length 13—15 mm. " ' 



Occurs in Texas, Dacota, Kansas (Snow), Washington. 



3. €eropale!>i texaiia Cr. 



Ceropales texana Cr., Tr. Am. Ent. Soc. iv, p. 208, %, 1872. 

 S --Black; face, clypeus, labrum, except a central longitudinal mark spot 

 between the antenna, scape and following joint of antenufe beneath, posterior 

 margin of protliorax above, posterior angles of the metathorax, two elongate 

 transverse spots on the first abdominal segment, a spot in the middle of the'fifth 

 on its posterior margin, and the sixth and seventh segments entirely whitish or 

 yellowish; abdcmien and legs sericeous; the tarsi brownish, the anterior coxre 

 with silvery pubescence; a transverse excavation at base of metathorax polished 

 and deepest medially, from which begins a strong, short sulcus; the posterior 

 surface of metathorax finely granulated. Length 10—12 mm. 



Occurs in Texas, Colorado and Washington. Tlie spociniens 

 before me differ from Cresson's description in having the clypeus 

 entirely whitish yellow. This species is suj)posed to\e the % of 

 iiigripes. 



4. Ceropales rraterna Sm. 



Ceropules fraterna ^m.. Cam]. Ilym. Brit. Mus. pt. iii, p. 180. 9. 185(5 • 

 Cr., Tr. Am. Ent. Soc. i, p. 140, 9 ^. 1867. 

 9. -Black; head very finely punctured, the longitudinal imi)ression on the 

 front faint; antennie as long as the head and thorax: anterior and posterior 

 orbits, face, clypeu.s. the latter sometimes with a longitudinal medial black mark 

 labrum spot at base of antenna;, scape and first joint beneath, posterior margin 

 of the prothorax, tubercles, spot on po.stscutellum and i)osterior angles of t"he 

 metathorax, spot on meso-pleurje, anterior and medial coxre before, and the pos- 

 terior (.oxffi behind, a transverse baud before the apical margin of first abdominal 

 segment, a band on the apical margins of segments 2-4, and segments 5 and 6 



TR.^NS. .AM. ENT. SOC. XIX. ^^,j„, ,.,,,, 



