June, 1904] ViERECK AND COCKERELL : PhILANTHID/E. 85 



Cheeks and vertex at least partly brown ; clypeus with a truncate, not very 

 prominent process ...zonata. 



Table of Species (alternative). 



1. Second submarginal cell petiolate 7 



Second subraarginal cell not petiolate 2 



2. Metathorax largely black 3 



Metathorax with very little or no black 6 



3. Occipital region black and with a yellow spot ." 4 



Occipital region black and red, no yellow ; bands on abdomen pure yellow. 



rubripes. 



4. A small shining space at apex of triangular enclosure of metathorax ; scutellum 



and postscutellum maculated 5 . 



No small shining space at apex of triangular enclosure ; scutellum immaculate, 

 postscutellum yellow chapmanas. 



5 . Enclosure transversely striated simulatrix. 



Posterior border of enclosure smooth, not striated fulvipes. 



6. Female with a prominent process each side of clypeus, in male simply convex ; 



largely yellow, decorated with red canaliculatus . 



7 Head partly or entirely red or brown 8. 



Head black and yellow or cream color lo. 



8. Female clypeus with a prominent acute production 9. 



Clypeal production not prominent, truncate zonata. 



9. Pygidial area long and narrow, more than twice as long as broad unicornis. 



Pygidial area hardly twice as long as broad ; metathorax red, yellow and black. 



fulviceps. 



10. Light marks pale primrose color tricolor. 



Light marks bright yellow II. 



11. Enclosure on metathorax inconspicuous, punctate montana. 



Enclosure on metathorax conspicuous, striate Striareata. 



Eucerceris striareata, new species. 



9. Length 15 mm., black and yellow. Head large; eyes diverging below; a 

 longitudinal ridge between antennas ; mandibles long, with a prominent tooth on 

 inner side ; clypeus not produced into a spine ; lower margin of clypeus with a pair 

 of .short black denticles on' each side opposite the mandibular tooth, which appears to 

 fit between them ; face closely punctured, becoming striate-punctate on the front ; 

 head black, with the clypeus, base of mandibles, stripe from very near anterior ocellus 

 to clypeus (widening below to form a triangular supraclypeal mark), very broad lat- 

 eral face marks (ending very bluntly on front, there diverging from the orbits), and 

 broad band behind eyes, all deep lemon-yellow ; antennse black, with the first three 

 joints of the flagellum ferruginous, and the fourth partly so; thorax black, with the 

 upper border of prothorax broadly, a round spot with a linear upward extension below 

 tegular, a large spot on each anterior corner of scutellum, postscutellum, and a large 

 mark on each side of metathorax, all bright yellow ; mesothorax shining and sparsely 

 punctured, the parapsidal grooves very distinct, a small area on anterior margin on 

 each side of middle covered with minute punctures ; scutellum very sparsely punc- 

 tured, except on its posterior margin, where the punctures are closer ; enclosure of 



