670 
The Philippine Journal of Science 
1921 
in absence of the rufous markings of the abdomen (the narrow 
testaceous bands on the apical margins of the tergites are not 
wanting). Fuscous spot in the anterior wing confined to the 
area anterior of cubitus and beyond end of the radial cell. 
Male. — Length, 14 millimeters; length of anterior wing, 10 
millimeters. In Kohl’s monograph of the species of this group 1 
the male runs to Isodontia diodon Kohl but differs from that 
species in the color of the wings. From Isodontia egens Kohl, 
to which it seems allied, it may be distinguished by the longer 
third antennal joint. In the male the mandibles are slender, 
acute apically, and with an inner tooth near apex (almost biden- 
tate apically) ; the outer margin is simple and not as in the 
female; distance between eyes below but little less than the 
combined length of the third and fourth antennal joints; eighth 
sternite with a broad, arcuate emargination medianly; antenna 
longer than head and thorax. Color and sculpture as in the 
female. 
Type locality. — Puerto Princesa, Palawan. 
Allotype locality. — Los Banos, Laguna, Luzon. 
Type. — Catalogue No. 23635, United States National Museum. 
Both specimens from C. F. Baker, the allotype under his 
No. 370. 
TribelSPHECINI 
Genus SPHEX Linnaeus 
All of the Philippine species of Sphex belong to those sub- 
genera which have the first two abdominal segments forming 
the petiole. No species of Psammophila, which has the petiole 
formed of the basal part of the first segment, has been recorded. 
The species now called Sphex were formerly assigned to Ammo- 
phila (a synonym of Sphex) and are better known under that 
name. 
Key to Philippine species of Sphex. 
1. Tarsal claws with two inner teeth near the base; large, black, with 
violaceous wings Sphex (Ceratosphex) bakeri sp. nov. 
Tarsal claws simple; wings fuscohyaline 2. 
2. Frons normal, convex; dorsal part of pronotum with distinct transverse 
rugae; scape of female reddish Sphex atripes (Smith). 
Frons deeply concave; dorsal part of pronotum without distinct trans- 
verse rugae (in one specimen there are a few indistinct wrinkles); 
scape black in both sexes Sphex coronatus (Costa). 
’Ann. Naturh. Hofmus. Wien 5 (1890). 
