ENTOMOLOGY 955 
29. Frons rather narrow, a little less than twice as long as wide at the vertex, where it is dis- 
tinctly narrower than above the antennae; basal callosity long, occupying a little 
less than one-third of the frons, semi-elliptical and not touching the eyes; frons with 
only two rather small, velvety, lateral spots. First antennal segment small, only 
slightly more swollen toward the apex which is not conspicuously humped above; 
basal division of third segment very wide. Body mostly pale yellowish, darker 
toward the apex of the abdomen, which bears very faint, lateral, gray spots; pale 
rings of the tibiae rather faint. Wing moderately infuscated, with few pale mark- 
ings not forming distinct rosettes. Length,8mm....................... A. rufula. 
Frons wider, about one and one-half times as long as wide at vertex, where it is scarcely 
narrower than above the antennae; basal callosity short, occupying only one-fourth 
of the frons, transverse and broadly contiguous to the eyes; frons with two rounded, 
velvety, lateral spots and a smaller, median spot far below the vertex. First anten- 
nal segment strongly swollen above in profile, and somewhat humped in the apical 
portion; basal division of third segment moderately wide. Body brownish yellow; 
the abdomen with a median, gray stripe and two rows of conspicuous gray spots; pale 
rings of tibiae distinct. Wing faintly smoky, the few pale markings not forming dis- 
tinetoraseties, Inenetiic RO... une. ec. . tenn sae olin pod bade vs H. brunnescens. 
30. Frons rather narrow and nearly parallel-sided, slightly over one and one-half times as 
long as wide at vertex; basal callosity very long, occupying about one-fourth of the 
frons, rectangular and broadly contiguous to the eyes; velvety, lateral spots placed 
about midway on the frons. First antennal segment very gradually swollen toward 
the apex in profile, about twice as long as thick. Body mummy-brown; the distal 
portion of the scutellum conspicuously paler ochraceous buff; the abdomen with two 
rows of large, gray spots; face gray throughout. Wing slightly smoky, with rather 
inconspicuous light markings not forming distinct rosettes and much broken up 
IELORAOUR: ENG S tO mM, .... ga oad coed’ wr ea Sind oem oo. H. sanguinaria. 
Frons much wider; either nearly as wide at vertex as long or distinctly narrowed toward 
ECON CREE ween ee ieee eee, Ge Beet se Patt aia, Otic, Was Se Ae Oe Cea Gt ket eo ee a dl. 
31. Frons distinctly narrowed toward the vertex. Face uniformly gray throughout. Anten- 
05S: SLE ci A Seether ecle) Mena rg en ers Aiea een eR AP gre Soma ee eee eee 32. 
MEO ereeee byrne QING eI Cinaeuc mre a act Snot Sure ey eG ob bake CA re cwles AeWae oe eee 33. 
32. First antennal segment short, only very little swollen, black, covered with dull gray 
pollinosity; basal division of third segment slender, a little wider basally, much 
longer than the first segment; the last division shorter than the two preceding ones 
together. Frontal callosity short, hardly one-fourth the length of the frons, trans- 
verse and broadly contiguous to the eyes; frons with two large, rounded, velvety, 
lateral spots. Pale rings of tibiae indistinct. Body black, with gray pollinosity; the 
abdomen without spots. Wing moderately infuscated; the clear spots larger than 
usual, covering most of the discal cell. Length, 9 to 11 mm............. H. similis. 
First antennal segment conspicuously swollen, shiny black; basal division of third seg- 
ment more stubby, about as long as the first segment and conspicuously wider near 
the base; the last division about as long as the two preceding ones together. Frontal 
callosity very prominent, occupying about one-third of the frons, semi-elliptical and 
broadly contiguous to the eyes; frons with two large, more or less crescent-shaped, 
velvety, lateral spots and with a more or less distinct, smaller median dot at the 
vertex. Pale rings of tibiae distinct. Body black, the abdomen with two broad, but 
rather faint, longitudinal, gray stripes and narrow, gray margins to the tergites. 
Wing strongly infuscated; the clear spots narrow and forming three distinct rosettes 
around the apex of the second basal cell, the apex of the discal cell, and the fork of 
the third longitudinal vem. Length, 8.5 to 10 mm.....................65 H. furva. 
33. Antennae black; the first segment conspicuously swollen, shiny; basal division of third 
segment about the length of the first segment, rather wider than usual. Frons with 
three large, velvety spots, two lateral ones and one median. Abdomen with rather 
faint gray spots. Wing moderately infuscated, with clear spots forming three distinct 
rosettes around the apex of the second basal cell, the apex of the discal cell, and the 
fork of the third longitudinal vein. Length, 10 mm................ H. tumidicornis. 
Antennae extensively dirty yellowish; the first segment small, only very little swollen, 
