22,4 Rohwer: New Hymenoptera from Malayan Region 347 



Pronotum shining, with large well-separated punctures ; seen from above 



the horns of head are evenly rounded; four anterior legs reddish 3. 



3. Posterior orbits uniformly punctured; vertex with large uniform punc- 

 tures; antennae rufous D. luzonensis sp. nov. 



Posterior orbits with umbilicate punctures anteriorly, and with fine 

 punctate granulations posteriorly; vertex with depressed area (which 

 is finely granular) extending obliquely and along the line of the pro- 

 jected lateral carina of frontal horn; flagellum piceous. 



The only species of Dirhinus recorded from the Philippines 

 not included in the above key is D. anthracia Walker. The 

 original description of this species is so inadequate that the 

 species cannot be placed. The size and color of the antennae 

 would separate Walker's species from the larger forms here 

 described. The original description of Walker's species is as 

 follows : 

 Dirhinus anthracia Walker. 



Dirhinus anthracia Walker, List Hym. Brit. Mus., pt. 1 (1846) 8, 85. 



Nigra, pedibus rufis, metapedibus nigris, alis limpidis. 



Body black, dull, punctured: antennae black: head clothed beneath with 

 silvery down: tips of the scutellum dentate: abdomen smooth, shining, 

 much shorter than the thorax: legs red; hind legs black: wings limpid; 

 squamulse and nervures piceous. Length of the body 2 lines; expansion 

 of the wings 21 lines. 



Philippine Islands. 



Dirhinus banksi sp. nov. 



Female. — Length, 2.5 millimeters. Head above and pronotum 

 coarsely and closely punctured ; antenna as in fig. 1, d; posterior 

 orbits with large- umbilicate punctures ; anterior part of scutum 

 shining, but finely reticulate; sides and posterior portion of 

 scutum coarsely punctured with a tendency to striate puncta- 

 tions medianly; scutellum with large punctures except for a 

 large, polished area medianly ; propodeum reticulate and with a 

 broad, shallow depression at basal middle; first tergite with 

 four strong longitudinal carinse; base of second tergite striate 

 medianly; rest of abdomen polished; hind coxze transversely 

 striate. Black; four anterior tibiae and femora somewhat 

 marked with piceous ; all tarsi yellowish ; wings hyaline, vena- 

 tion pale brownish. 



Type locality. — Manila, Luzon, Philippine Islands. 



Described from two specimens (one type) the sex of which I 

 cannot be sure about, under accession No. 18576, Bureau of 

 Science. Material collected by C. S. Banks and said to be a 

 parasite of Lucilia species. 



