XIV, 3 Felt: New Philippine Gall Midges 991 
rudimentary. Genitalia: Basal clasp segment moderately long, 
stout ; terminal clasp segment long, slender, swollen basad; dorsal 
plate deeply and triangularly emarginate, the lobe sparsely setose, 
tapering to a narrowly rounded apex; ventral plate apparently 
very long and slender and with a somewhat curved, quadrate, 
obliquely truncate, lateral process at the basal third, the length 
of which is approximately one-third that of the entire organ. 
The distal portion of the ventral plate beyond this process is 
slender and a little longer than the basal part; harpes chitinized, 
indistinct; style rather short, stout, obtuse apicad. 
Female.—Length, 1.5 millimeters. Antenne a little shorter 
than body, sparsely haired, dark brown, of 14 segments, fifth 
with a stem one-fourth the length of the cylindrical basal enlarge- 
ment. The latter is two and one-half times as long as its diam- 
eter. It bears a sparse subbasal whorl of long, stout sete 
and a median band of shorter, slender, curved setz. Circumfila 
unusually heavy, terminal segment produced, length of basal 
portion four times its diameter, appendage knoblike. Mesonotum 
dark brown, submedian lines sparsely haired. Scutellum yel- 
lowish fuscous. Postscutellum dark brown. Abdomen mostly 
dark brown, basal segments with a dark orange hue. Legs 
mostly dark brown, fourth tarsal segment of anterior legs and 
distal tarsal segment of middle pair of legs white in certain lights. 
Ovipositor short, the lobes roundly triangular and sparsely setose, 
otherwise as in the male. 
 Type.—Cecid. a2888, New York State collection. 
MINDANAO, Lanao District, Kolambugan, June 10, 1914, College 
of Agriculture accession No. 18184 (C. S. Banks). 
The midges described above were accompanied by the statement 
that they were caught on a spider’s web. They were dancing 
on the web, by the thousand, on a bright sunshiny afternoon. 
This peculiar species has unusually heavy circumfila in the 
female, and the male genitalia present striking characteristics. 
Arthrocnodax copre sp. nov. 
Male.—Length, 0.75 millimeter. Antenne a little longer than 
body, thickly haired, reddish brown, of 14 segments, fifth having 
stems with a length one-half and one and one-half times their 
diameters, respectively. Basal enlargement subglobose, distal 
broadly ovoid, both with moderately long and unusually heavy 
circumfila; basal enlargement of terminal segment subglobose, 
stem relatively short, distal enlargement broadly cylindrical, 
apex almost truncate. First segment of palpi short, irregular; 
second with a length three times its width; third a little shorter 
