DOLBOGENE; I SO GRAMMA; CERATOMIA; ISOPARCE. By Dr. M. Drattdt. 
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D. schausi Clark (91 a) is very closely allied to clarki; the white abdominal spots much smaller; the schausi. 
distinct black markings on the forewing of hylaeus are brown, the white areas on the wings are strewn with 
brown and the ground-colour is therefore more monotonous, the marking more blurred; post median line in¬ 
distinct and less sharply dentate. Forewing marked lighter brown. Colombia (Cauca Valley). 
8. Genus: R.&J. 
Distinguished from Dolba by the short, long-spined first protarsal segment and shorter spurs. Only 
2 species: 
D. hartwegi Btlr. (= hylaeus Wkr. part.) (91 a). A small brownish grey species distinguished by the harlwegi. 
very strong black vein-streaks on 2 and 3 and subapically; transverse markings as in the allies; postdiscal 
spot mostly somewhat darkened. Hindwing greyish-brown, lighter at the base. Mexico to Honduras. 
D. manni Clark (91 d). Fore wing smoky brown, clouded lighter, more monotonous than hartwegi, manni. 
smaller and with narrower wings, with a white spot at the cell-end; inner margin darkened in the basal half, 
the transverse markings more diffuse. Hindwing smoky brown, the light transverse band narrower than in 
hartwegi and whitish analwards. Mexico, Guerrero. 
9. Genus: IsograiBrnasa R.&J. 
Closely allied to Geratomia and Chlaenogramma, from which it is separated by the spined anterior 
tibiae and the apex of the middle tibia; the long terminal spur of the posterior tibia is shorter than the first 
tarsal joint; pulvillus present. Only 1 sjrecies: 
I. hageni Grt. (93 c) is externally similar to C. undulosa, but it is separated by the structural differences hageni. 
and the yellowish-green tint of the colouring. Texas. 
10. Genus: Ceratomia Harr. 
Proboscis, palpi and eyes relatively small. Tibiae not armed; anterior tibiae short, the first protarsal 
joint with 3 or 4 long, thick thorns outside; middle tarsi without bristles. Pulvillus absent; paronychium with 
1 lobe on each side. 3 species from North America. 
C. amyntor Hbn. (= quadricornis Harr., ulmi Bsclv.) (93 e). A large strong species; forewing more amynior. 
or less strewn with brown on the whitish ground, the head, collar and the costal-marginal half of the forewing 
remaining lightest; lower half of median area deep dark brown; anterior transverse line only visible as pointed 
dents in the costal-marginal part, posterior line 3 or 4 fold, feebly dentate and filled with light; intense black 
longitudinal rays in the median area and subterminally towards the apex. Hindwing lighter greyish-brown, 
darkened towards the margin, with a narrow and a broad brown marginal band. Larva very peculiar owing 
to 4 horns on the thoracal segments. It lives on elm. 
C. undulosa Wkr. (= brontes Wkr., repentinus Clem.) (93 e) is of a lighter whitish-grey ground-colour undulosa. 
with distinct blackish-brown transverse lines; especially those in the postmedian area are very sharply dentate; 
subterminal line bordered with a somewhat darker brownish colour outside, the subapical dentate line is 
bordered with white towards the costal margin. Hindwing whitish, brownish grey in the disc, with antemedian 
and median transverse lines, and a broad blackish-brown marginal band. Larva light green with 7 greenish 
white oblique bands. It lives on ashes and Liguster. Canada to Carolina. — subsp. poiingi Clark is of a much poling i. 
darker grey total colouring without any yellowish admixture, the stigma is smaller and less prominent, with 
more intense transverse lines and apical line, submarginal line indistinct; the white colour disappears on the 
fringe of the hindwing. Texas. — borealis Clark is the Canadian subspecies from Manitoba, the colouring is borealis. 
intermediate between the two others, with less distinct markings, the stigma often very small, hindwing mono¬ 
tonously dark grey above, with indistinct transverse bands. 
C. eatalpae B.sdv. (94 a) has somewhat narrower wings than the preceding species, of a more brownish catalpae. 
total colouring, the transverse lines much less distinct, particularly the antemedian ones; the postmedian ones 
are much less curved and more extinct, the black longitudinal l’ays in the discal area are more distinct and 
longer. The transverse lines on the brownish hindwing are almost extinct, the marginal band very dark as 
far as the margin. Larva on Catalpa and occasionally injurious by its immense numbers. It is light green, 
blackened above, with a light green interrupted subdorsal stripe; head and horn black. New Jersey and Penn¬ 
sylvania to Florida. 
11. Genus: Isoparce B. & J. 
Distinguished by the very short and feeble proboscis, the short palpi being roughly haired. Tibiae 
spineless, the short first protarsal segment with several thick thorns outside, spurs very long. Pulvillus absent, 
paronychium without lobes. 6 and 7 of hindwing on a long stalk. Only 1 species: 
