Tue CrANE-Fures oF New York — Part II 877 
of hairs surrounding two pairs of setiferous tubercles. The mental region 
is not chitinized. The dorsal plates of the head capsule are widely sepa- 
rated from each other by a median split. 
The pupae are often armed with spines or tubercles on or about the 
head and the thorax.. The lateral abdominal spiracles are large and 
functional. 
The genera of the subtribe Hexatomaria may be separated by the 
following keys: 
Larvae 
. Coloration of body a deep saturated orange-yellow; spiracular disk with ventral lobes 
unlined with darker, bearing at tips a few very long hairs. .. Penthoptera Schin. (p. 891) 
Coloration of body pale yellow, whitish, or greenish; spiracular disk with lobes lined 
BBN AE Ke ORO WAMROrsOACKIne pat eaeees cies ile ee see oe ae eee ele se oe teins shale ars 2 
. Size small, form slender (length 14-15 mm., diameter 1-1.3 mm.) . . Hexatoma Latr. (p. 877) 
Size larger, form stouter (length over 15 mm., diameter over 1.6 mm.) 
Eriocera Macq. (p. 881) 
Pupae 
. Pronotal breathing horns short and stout, red at base and apex, the remaining part 
dark-colored, transversely wrinkled; horns bent strongly toward each other at tips. 
Penthoptera Schin. (p. 891) 
ronotalsoreathinewbornsnot.as above... ..... 06.02. cscgsensescdencesecnresecesene 2 
moize small @ength under 10 mm.)..........0..5...02--0see ne Heaxatoma Latr. (p. 877) 
Bear meri(lenetim Over 12 MM.) 6. a. cise Sele aly we ete ee eaiarese os Eriocera Macq. (p. 881) 
enus Hexatoma Latreille (Gr. sxx + I cut) 
1809 Hezxatoma Latr. Gen. Crust. et Ins., vol. 4, p. 260. 
1818 . Nematocera Meig. Syst. Beschr. Zweifl. Ins., vol. 1, p. 209. 
1818 Anisomera Meig. Syst. Beschr. Zweifl. Ins., vol. 1, p. 210. 
Larva.— Size small (length of Hexatoma megacera about 14 mm.). Spiracular disk sur- 
ounded by two pairs of lobes, ventral pair the longer, inner face marked with a narrow 
brown line which is expanded at its inner end. Head capsule with lateral angles of labrum 
blongate and densely clothed with hairs. 
Pupa.— Size small (length under 10 mm.). A large spinous tubercle on scape of antenna. 
© median projection on mesonotal scutellum. Pronotal breathing horns short and straight. 
Wing pads with cell R. very small and M with but a single branch reaching wing margin. 
The genus Hexatoma includes a small number of forms with a chiefly 
Holarctic distribution, there being about eleven Palearctic, two Ethiopian, 
bnd one North American species so far described. The adult flies of 
fhe North American species, Hexatoma megacera, are common on vegetation 
Mong the banks of rather large streams. They are discussed herein in 
Hetail under the account of this species. The adult flies of some of the 
farger European species have habits quite like those of the genus Eriocera, 
