16. 
18. 
19; 
20. 
ENTOMOLOGY 953 
First antennal segment slender or, if swollen, more than twice as long as thick seen from 
ADOVe: “EVONS NamMower, NONas WNOAd AS TONG. ... csi ieee c cece nsavacsevvsaeees 15. 
). Clove-brown; dorsum of abdomen with hind margins of segments and a double series 
of spots gray. Frontal callus large, black. Dorsum of thorax with faint indications 
of longitudinal gray stripes anteriorly, the hind margin and base of scutellum light 
gray. Basal segment of middle and hind tarsi conspicuously creamy white at base. 
DUCA te tem MINN s ype cp Ua Meee oa aha Ses adhe Le hd woh Cd aoe aloe H. cruenta. 
Basal segment of middle and hind tarsi faintly paler at base, not with a conspicuous 
CITC GUMUIS CIGILA sy ok Una uN a ast eg ee Po Cae 16. 
Wing strongly infuscate, with relatively few, small, much scattered hyaline spots; second 
basal cell with two narrow streaks; apical streak rather broad, but ending in the 
second submarginal cell far from the hind margin. First antennal segment very 
slender, about as long as the elongate basal division of the third segment; the latter 
distinctly expanded near the base. Length, 10 mm.................. H. schoutedeni. 
Wing much more abundantly blotched with hyaline spots; second basal cell with four 
nyaline spots forming two incomplete TINGS. <0 s4.ccsa dacs Se vule wr ele obo ee eae i Wg 
. Hyaline blotches in the wing distinctly grouped into three rosettes, around the apex of the 
second basal cell, the apex of the discal cell, and the fork of the third longitudinal 
vein; apical streak ending in the second submarginal cell far from the hind margin. 
Basal division of third antennal segment moderately and almost uniformly thick 
throughout, slightly longer than the first segment. Frons with elongate, lateral, 
velvety spots and a small, median, velvety dot. Length, 9.56 to10 mm. JH. partifascia. 
Hyaline blotches in the wing more uniformly scattered, not forming conspicuous rosettes; 
apical streak broad and, as a rule, continuing to the hind margin. Basal division of 
third antennal segment moderately thick, but distinctly widened in the basal half, 
about as long as the first segment. Frons with rounded, velvety spots on the sides, 
Withoutmedian. dot, Juength, Sto: 9:5 mim... 45.645. ic etee ce esas os H. wnsatiabilis. 
First antennal segment rather long and thick, with a conspicuous transverse depression or 
deep notch on the upper side, dividing the apical portion....................0-. 19. 
First antennal segment without constriction or notch before the apex................. 21. 
Face mostly covered with gray pollinosity, sometimes with a small, velvety, dark spot 
near the eye on each side. Frons about as wide as long, with two small, rounded, 
velvety, lateral spots and a median, velvety, much smaller spot. Basal division of 
third antennal segment rather slender, slightly shorter than the first segment, about 
twice as long as its greatest width which is at the basal third. Fore tibiae with the 
basal half conspicuously white. Tip of wing with a faint clear blotch beyond the pre- 
mpicabauresic. neneth, Oro: to Mm, 62.6 fase eas hae dk olS Re ede ween H. mactans. 
Lower part of face covered with gray pollinosity, sharply contrasting with an upper, 
darker, more or less velvety, transverse band. Basal white rings of tibiae narrower 
and less conspicuous. Tip of wing only with the preapical clear streak........... 20. 
Dark brown, with dark brown to black legs and antennae. Antennae rather short; 
the basal division of the third segment broadly elliptical, at most one and one-half 
times as long as wide and much shorter than the first segment. Length, 8 to 
Saige Paw Pe Ath gaat Oe Ae oP HO AREAL toned wate Mire ares Sin ae Cea H. vittata. 
Paler yellowish-brown, with the antennae and legs much of the same color. Antennae 
rather long; the basal division of the third segment narrowly elliptical, nearly twice 
as long as its greatest width and shorter than the first segment. Length, 10 to 
eee Tuleh ere ete ere veer ve RR Te Now videocb CR a3 8 dade rwialarwn H. ochracea. 
. Transverse diameter of the head unusually long; frons wider than long and distinctly 
narrowed toward the vertex, with only two transverse, velvety spots in its lower half. 
First antennal segment very short, less than twice as long as wide, but not much 
swollen; basal division of third segment narrowly elliptical, about the length of the 
first segment. Abdomen broad, with rows of conspicuous spots. Length, 7.5 to 
LIRR Rene ee Oe No Ga AON wales ew TAGE Oat ernd v2 2u Oty Gla. ONT tis elas ows H, hirta.. 
Frons narrower or with parallel or subparallel sides. Antennae not unusually short.... 22. 
Body extremely Tabanus-like. Abdomen dorsally with conspicuous, lateral, gray spots 
which are connected with the gray anterior margins of the tergites; their sides and 
hind margins also gray. Frons longer than wide, with three small, velvety spots. 
