100 PEOCEEDIXGS OF THE NATIOXAL MUSEUM vol. 7.T 



above; narrow posterior border of pronotum; sides of prothorax, 

 except large spot in front of tubercles; broad lateral lines and broken 

 U-shaped discal mark on scutum; narrow fascia on posterior border 

 of seutellum widened at its extremities ; fascia on metanotum ; narrow 

 fascia on propodeum, widened and interrupted on its posterior sur- 

 face; large spot on lateral angle and side of propodeum; spot on 

 metapleura ; narrow spot on mesopleura ; fasciae on all tergites con- 

 tinuous; that on finst tergite broad laterally, narrower dorsally and 

 deeply notched at midline on anterior border; that on second tergite 

 inclosing pair of dorsal black spots and also notched at midline on 

 anterior border; remaining fasciae more or less deeply biemarginate 

 on anterior border; small lateral spots on sternites 2-4; femora in 

 part; tibiae, except spot below on all and spot above on anterior 

 pair; and tarsi; yellow. 



The flagellum is black above, testaceous below ; the seventh segment 

 is slightly spinose on its posterior median border and the eighth and 

 ninth segments are very slightly spinose at the posterior apical border. 

 Segments 9-11 are somewhat excavated below and the terminal seg- 

 ment is slightly curved and light in color at the apex. The frons 

 between the antennae is carinate, as is also the base of the clypeus. 

 The anterior metatarsus bears six spines. The inner margins of the 

 eyes are approximately parallel. The middle femur on the distal 

 half of its posterior border is dentate, the teeth being quite small. 

 The second sternite is carinate on the midline, with the posterior end 

 of the carina taking the form of a weakly developed tubercle. The 

 sixth sternite bears a distinct tubercle that is not at all pointed. The 

 seventh sternite bears a prominent, median, longitudinal carina, and 

 the seventh tergite is distinctly, though not deeply, emarginate at 

 the apex. The wings are hyaline and the pubescence normal. 



With respect to the maculations, there is little variation between 

 the type and the eight paratypes. With respect to the development I 

 of the processes on the second and sixth sternites, however, there is 

 considerable variation, and in the preparation of my key to the males 

 of this genus I have endeavored to avoid confusion due to this varia- 

 tion by inserting this species in the key in two places. 



In the collection of the United States National Museum, taken by 

 the same collector at the same place as the males assigned to this 

 species, and presumably at the same time, is a single female that may 

 be the female of this species, but in the character of its maculations 

 it differs so widely from the males that, in the absence of any data i 

 other than that just stated above, I do not feel justified in assuming 

 that it is the female of this species. The antennae are black; the 

 frons, clypeus, and labrum are almost wholly black, and maculations 

 on the scutum, seutellum, and propodeum (except on the lateral 

 angles) are entirely lacking. 



