674 
The Philippine Journal of Science 
1921 
Sceliphron (Chalybion) violaceum (Fabricius). 
The few specimens of this species may be divided into two 
groups on the punctation of the frons, but it is probable that 
this will vary. More specimens should be studied. 
Luzon, Manila ( Robert Brown ) : Laguna Province, Los Banos 
( Baker 379, 1290) , Mount Maquiling ( Baker 1351) : Rizal Prov- 
ince, Alabang (B. Arce) , accession No. 1853, Bureau of Agri- 
culture. 
Subgenus Sceliphron Klug 
Three species of this subgenus are represented in the Philip- 
pine material before me. One other has been recorded from the 
Islands, and in the following key I have tabulated it as well as 
certain other Oriental species. Those not recorded from the 
Philippines are preceded by an asterisk. 
Key to certain Oriental species of Sceliphron. 
1. Comparatively large species without yellow marks on thorax and with 
black pubescence; length about 27 millimeters 2. 
Medium-sized species with yellow markings on thorax and with pale 
pubescence, length under 18 millimeters 4. 
2. Petiole and hind femora black S. luzonensis sp. nov. 
Petiole and at least base of hind femora yellow 3. 
3. Hind femora and tibiee marked with black * S. intrudens Smith. 
Hind femora and tibiae all yellow * S. spinolae Lepeletier. 
4. Petiole but little longer than the propodeum; apex of first tergite 
marked with yellow; scutellum yellow S. deforme (Smith). 
Petiole twice or more than twice as long as the propodeum; postpetiole 
all black 5. 
6. Scutellum black S. madraspatanum (Fabricius). 
Scutellum yellow S. conspicillatum (Costa). 
Sceliphron luzonensis sp. nov. 
Sceliphron intrudens (Smith), var., Williams, Bull. Hawaiian Sugar 
Planters’ Assoc. 14 (1919) 120. 
This form is closely allied to intrudens and may ultimately 
be treated only as a subspecies. It is however as different as 
spinolae, and until the group can be treated from a study of 
material I prefer to treat the Philippine form as a species. 
Female. — Length, 27 millimeters; length of anterior wing, 17 
millimeters. Anterior margin of the clypeus with a deep, nar- 
row, V-shaped median emargination, separating the broad, 
rounded, depressed lobes ; frons with distinct, rather close punc- 
tures on a granular surface; a small area adjoining ocelli 
impunctate; ocelli in an equilateral triangle; postocellar line 
