212 WILLIAM J. FOX. 



18. — Middle segment not marked by fovefe between the u])per surface and the 

 posterior face, the latter striato-punctate as above; dorsulum with the 

 punctures close throufjhout, those on posterior portion but little or not at 



all separated )«exinaciilatus. 



Mifldle seffraent with the upper surface and posterior face separated by a 

 series of strong fovese, the jiosterior face transversely rugose; dorsulum 

 with the punctures on posterior portion distinctly separated. 



trirasciatus. 



19. — Pygidium without the lateral fringe of stiff hairs, or it is but feebly -.•ei)re- 

 sented ; head with strong, sometimes large, separa*^ed punctures, except 



in one case • 20. 



Pygidium with the lateral fringe always present and distinct; head with 

 close, rather fine punctures 25. 



20. — Head and first segment of abdomen with strong, separated punctures; iiro. 



notum with lateral tooth small and indistinct, or absent 21. 



Head rather finely and closely punctured, the punctures of the first ab- 

 dominal segment more distinct and separated, but scarcely stronger: 

 pronotum with a strong, distinct tooth, or rather spine, on each side 

 (abdominal segments 2-5 with a lateral spot) spiiiiferiis. 



21.— Trochanters, femora and tibiiB in part, reddish 22 



Trochanters, femora basally or entirely, black 2.3. 



22.— Space between the eyes at base of clypeus fully equal to the width of the 

 latter in the middle ; space between hind ocelli somewhat less than that 

 between them and nearest eye-margin ; no yellow on scutellum or epis- 

 ternum mesopleuralis (second abdominal segment with a broad band, the 

 remaining apical segments either narrowly banded, or with the bands 

 broken into spots, which sometimes are only evident at the sides). 



seaber. 

 Space between the eyes at base of clypeus somewhat less than the width of 

 the latter in the middle ; space between hind ocelli about equal to or 

 slightly greater than that between them and the nearest eye-margin ; 

 scutellum and episternum mesopleuralis more or less yellow (all the dor- 

 sal abdominal segments with a lateral si)ot, else the second banded and 

 the spots on remaining segments disappear; first and second segments 

 usually more or less rufous) rufipes. 



23. — Abdomen with segments 2. 4 and 5 banded with yellow: first segment very 



strongly punctured 24. 



Abdomen never banded, with a lateral s]ioton segments 2, 4 and 5, the third 

 segment rarely spotted, the second segment still more rarely: first seg 

 ment not very strongly punctured stirpicola. 



24. — Wings dark subhyaline, paler basally ; head coarsely punctured, most sparsely 

 so posteriorly ; femora apically and tibiae entirely, yellow; tarsi reddish 

 yellow; third abdominal segment with a small lateral spot, .fe.vaniis. 

 Wings subhyaline, slightly darker apically, with a strong yellow streak 

 along the costa; head evenly, though strongly punctured, more finely, 

 and closely so posteriorly ; femora black, except hind pair, which have a 

 reddish streak within ; tarsi black ; third abdominal segment with a 

 band centralis. 



