38 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
slender, tapering, apparently 2-segmented; thoracic spiracles similar 
in shape to those of intermediate stage, and with similar pores; ab- 
dominal spiracles not observable in single specimen available for 
study; derm with large disk pores of two sorts, dorsally, in definite 
pattern, with pores somewhat similar to those of adult, at margin 
ventrally, also definitely arranged, with disk pores similar to those 
found in the intermediate stages; derm with an occasional long, 
slender seta, with two longer apical setae, but these short and incon- 
spicuous compared with the total body length, widely separated and 
each curving inward; anal tube simple, opening apically; with a 
single median ventral cicatrix near apex of abdomen. 
Cotype.—Cat. No. 25274, U.S.N.M. 
Genus COELOSTOMIDIA Cockerell. 
COELOSTOMIDIA PILOSA (Maskell). 
Plate 2, figs. 3, 4. 
Reference.—Fernald Cat. Coce. World, 1903, p. 30. 
The Maskell collection includes three slides of this species, having 
the following data: One of “‘adultifemale,*1899,” one of ‘female 2nd 
stage, 1889,” one of “larva, 1889,’’ and besides this a few unmounted 
specimens under No. 120. 
Adult female——General appearance as described by Maskell; derm 
clearing completely when treated; antennae 11-segmented; legs not 
unusual, spines of tibia’and tarsus long, slender, apparently much less 
numerous than in zealandicum; mouth parts'wanting; with two pairs of 
thoracic and seven pairs of abdominal spiracles, these similar in general 
appearance, but the thoracic with a chitinous bar, and not strongly 
differentiated in size; derm pores of one type, circular to oval multi- 
locular disk, with circular to elongate oval, almost bilocular centers; 
derm spines slender and hair-like, but stout and expanded at base, 
very abundant; derm setae also slender, with conical basal collars, 
these less numerous than the}‘‘spines’”’? and in many cases much 
larger, but varying in size,‘largest alongithe body margin; anal tube 
simple; no ventral cicatrices noted. 
Intermediate stage female.—General {appearance as described by 
Maskell; antennue much reduced, triangular, apex rounded, with 
faint indications of joints near base; apex with a number of spines and 
hairs; legs similarly reduced, triangular, trochanter with a very long 
seta below, tarsus much reduced, claw with denticle, the digitules 
long, slender, with knob at apex; beak short, conical, distinctly 
2-segmented, with a membraneous basal portion possibly representing 
the third segment considered present by Maskell; with two pairs of 
thoracic and seven pairs of abdominal spiracles, the first about twice 
as large as the second, all with two or more pores near opening; derm 
pores of one type only, small, circular, with a large bi-, tri-, or 
