Oia CLARK — NEW SPHINGIDAE 59 
tone and markings. Two discal streaks R3-M2 very faint. Transverse an- 
temedian, median and postmedian lines similar to P. florestan, narrow and 
clearly marked. Antemedian irregular in outline; three median lines sharply 
serrate; postmedian regularly undulate; a light band between the two 
outer median lines; apical line behind SC5 heavy. Dark markings on 
costal margin at ends of transverse lines 9 in number. Cilia white, dark 
at the veins. 
Hind wing above, dark brown, shading lighter toward base; postmedian 
band white, shaded with light brown, bordered proximally by a darker 
transverse line extending from anal angle to costal margin. Faint line 
parallel to this line, distant 2 mm. proximally, and fading away before 
reaching inner margin. Cilia white, dark at veins. 
Under side: fore wing light brown, unicolorous, a faint postmedian dark 
brown transverse band; cilia as above; between veins on distal margin, 
white lunulate spots. Hind wing light brown, white at anal margin; a 
transverse line corresponding to postmedian line on upper side; another 
faint antemedian line 3 mm. distant proximally at anal angle, and 6 mm. 
at inner margin. 
Dolba schausi sp. nov. 
Plate VIII, figure 3. 
Al.ant.long.,?,30mm. Al.ant.lat.,9,13mm. Marg.ext., 9,16 mm. 
Habitat.— Cauca Valley, Colombia. One female in coll. B. Preston Clark. 
I have named this species for my friend William Schaus. 
Facies and coloration so closely simulating D. hylaeus of North America 
that the species is best described by stating the various points of difference. 
Abdomen: White lateral spots and lines are narrrower. 
Fore wing above: Less contrast between the black and white markings 
and the brown ground tone of the wing. The sharp black markings of D. 
hylaeus become brown, and the white ones are irrorated with brown. The 
effect is a more uniform coloration and a blurring of the maculation. Post- 
median line running from costal to inner margin, so clear and sharply serrate 
in D. hylaeus, is vestigial and less sharply serrate. It thus serves as the 
proximal border of a dark brown band from costal to inner margin, 4 mm. 
wide at the costal margin and broadening gradually to a width of 6 mm. 
at the inner margin. Distal margin evenly convex, and more strongly so 
than in D. hylaeus. Hinder angle less sharp (more obtuse). 
Hind wing above: Basal area whitish. The broad black line extending 
from base to median band in D. hylaeus, is in this species brown, narrow, 
