AMERICAN HYMENOPTERA. 225 



Secoiul abdi.>iniual segment forruginon?, with four more or less distinct yel- 

 lowish spots — two, small, on basal margin and two, large 

 and almost confluent, near apical margin; size rather 

 large 74. mutata. 



Second abdominal segment fuscous, with two large, rounded, nearh- con- 

 fluent, yellowish on pale ferruginous spots near apical margin : 

 size small 75. scaevola. 



Second abdominal segment ferruginous, with a more or less distinct patch 

 of black pubescence on basal middle, from which, sometimes, 

 jiroceeds an oblique black line; apical margin more or less 

 black 73. ferrugata. 



Second abdominal segment ferruginous, apical margin blackish, with an 

 uninterrupted fringe of dense white pubescence ; first segment 

 fringed at apex with black, with a dot of white pubescence on 



middle of apical margin 76. balteola. 



Frst abdominal segment gradually dilated at apex and sessile with base of 

 second segment. 



Posterior angles of head acutely produced. 



Head very large, nearly twice broader than thorax, with two large sjiines 

 beneath behind mandibles 85. Kobinsonii. 



Head large, a little wider than thorax, cheeks with an acute sj^ine be- 

 neath 86. capitata. 



Posterior angles of head carinate, ending beneath in a short spine. 



Head ferruginous, with golden pubescence on vertex; second abdominal 

 segment \yith two pale j'ellowish spots 87, Lerma. 



Head entirely ferruginous, shining; second abdominal segment with two 

 large ferruginous spots, occupying nearly the whole segmout 



above 88. canadensis. 



Posterior angles of head carinate, unarmed beneath. 



Second abdominal segment above yellowish, a large spot on basal middle, 

 a dot on each side and broad apical margin, narrowed laterally 

 black; head and thorax black, with golden pubes- 

 cence sy. bisignata. 



Second abdominal segment above ferruginous, with a large black spot at 

 base and another at apex ; head with dense golckn ]iubes- 

 cence 90. counectens. 



Second abdominal segment above ferruginous, with three spots at base 

 (middle one largest,) and broad apical margin fuscous; head 

 with dense ochraceous pubescence 91. contumax. 



Seciiud abdominal segment above golden-yellow, with three black spots, 

 middle one large and longitudinal; head ferruginous, occiput 

 black 92. gothioa. 



Second abdominal segment above silvery, with three black spots towards 

 base, middle one large and longitudinal; head ferruginous, 

 occiput with two black spots. !•;>. Izucar. 



Second abdominal segment above golden-yellow, with three black spots at 

 base, and large transverse one at apex ; head very large, quad- 

 rate, ferruginous 94. Chiapa. 



Second abdominal segment above black, with a pale golden cross (extend- 

 ing the entire length and width of the segment. ..95. cruciata. 



