The Philippine 

 Journal of Science 



VOL. 22 APRIL, 1923 No. 4 



NEW HYMENOPTERA FROM THE MALAYAN REGION 



By S. A. Rohwer 

 Honorary Custodian of Hymenoptera, United States National Museum 



In identifying some Philippine Hymenoptera submitted by 

 Prof. C. S. Banks, of the Philippine Bureau of Science, certain 

 new species were found. Descriptions of these are included 

 in the following pages. In reporting on this material it seemed 

 advisable to add descriptions of certain related species, and the 

 descriptions of new species from Singapore are also included. 

 The types of all the forms here described are in the United 

 States National Museum. 



CHALICIDIDJE 

 Genus DIRHINUS Dalman 

 The genus Dirhinus Dalman in current classifications is sep- 

 arated from Eniaca Kirby by the number of antennal joints; 

 Dirhinus is said to have 12-jointed antennae, while the antennae 

 of Eniaca are described as 13-jointed. A careful examination of 

 the genotypes shows that these characters have been inaccurately 

 described and that, although there is a difference in the antennae, 

 this difference does not consist in the number of joints but 

 rather in the relative length of the third joint. In Dirhinus 

 the third joint is very short and easily overlooked, while in 

 Eniaca the third joint is long and plainly visible. The differ- 

 ences in the antennae of the two genera are illustrated in the 

 accompanying figure (fig. 1). From an examination of the 



