AMERICAN HYMENOPTERA. loT 



4. Planiceps concolor. , 



Planiceps concolor, Smith, Journal of Entomology, i, p. SO. 



'■'■Female. Length 5 lines. — Deep blue, with brilliant reflections in 

 different positions; mandibles obscurely ferruginous ; antennje black ; 

 wings beautifully iridescent, the anterior pair dark brown, the poste- 

 rior pale fusco-hyaline ; anterior tarsi rufo-testaceous, the intermediate 

 tibijfi and tarsi slightly spinose; abdomen of a smooth, shining, irides- 

 cent blue." 



Hah. — " Mexico." Not seen. 



b. Planiceps notabilis. 



Flankcps notabilis, Smith. Journal of Entomology, i, p. 80. 



'•'■Female. Length 1\ lines. — Black, subopaque, convex, with a fine, 

 silky, silvery pile ; that on the vertex and disk of thorax has a purple 

 iridescence; mandibles obscurely ferruginous at their apex ; scape of 

 the antennae compressed ; posterior ocelli situated on the posterior mar- 

 gin of the vertex; wings very dark and slightly iridescent; intermedi- 

 ate and posterior tibiae and tarsi slightly spinose. Abdomen : a large 

 subovate, yellowish-white spot on each side of the second and third 

 segments, and a single one at the base of the apical segment." 



Ilah. — ''Mexico." Not seen. 



Genus APORTJS, Spinola. 

 '■'■Head subrotund, a little wider than the thorax; eyes lateral and 

 ovate; the stemmata in a triangle on the vertex ; the antennae insert- 

 ed forward on the face at the base of the clypeus ; the labrum concealed. 

 Thorax elongate, the prothorax as long as the metathorax ; the wings 

 inserted in the middle at the sides of the thorax ; the superior pair [Fig. 

 Figure 14. 14] idth one marginal and two suhmarginal cells; 



\the marginal cell small; the jirst suhmarginal 

 'elongate, twice as long as the second, ivhich is snh- 

 quadrate, and receives both the recurrent nervures, 

 the first at ahout one-third from its hase, the second uniting icith the 

 second transverse cubital nervure; legs of moderate length, the anterior 

 tarsi not ciliated. Abdomen elongate-ovate." — Smith, Cafal. Brit. 

 Add. Hi/ni. p. 78. 



Aporus fasciatus. 



Aporu.H fasciatv.s, Smith, Cat. Ilym. Br. Mus. iii, p. 175. 

 ''Male. Length 4 lines. — Black ; the face covered with short sil- 

 very pubescence, the cheeks and the thorax have a similar clothing, 

 on the pro- and mesothorax it is very thin, but dense on the metatho- 

 rax, sides, coxae and femora beneath ; wings hyaline, their apical mar- 

 gins clouded. Abdomen : the apical margins of the first and three 



TRANS. AMER. ENT. SOC. (IS) JUNE, 1867. 



