MR. smith's descriptions OP HTMENOPTEROUS INSECTS. 57 



Descriptions of New Species of Hymenopterous Insects collected 

 by Mr. A. R. "Wallace at Celebes. By Frederick Smith, Esq., 

 Assistant in the Zoological Department of the British Museum. 

 Communicated by "W. W. Saunders, Esq., E.R.S., V.P.L.S. 



[Read November 3, 1859.] 



The present paper contains descriptions of upwards of 100 species 

 of Hymenoptera new to science, which form part of the second 

 collection made by Mr. Wallace at Celebes. Perhaps the most 

 interesting species described belongs to the genus DoUchurus, a 

 genus which previously contained only a single species, and that 

 ■indigenous to Europe ; the discovery of a second may be regarded 

 as one of the most valuable additions which Mr. Wallace has made 

 to this order of insects. The addition of a new species to the 

 genus Metlioca is also extremely interesting ; of the previously 

 known species, one is European, a second from Cuba, a third from 

 Canada, and a fourth from Northern India, showing the extensive 

 geographical range of this rare genus of solitary Heterogyna. 



The two collections of Hymenoptera from Celebes contain no 

 less than 164 new species, a number far exceeding that which I 

 have found in any similar collection, made in any part of the New 

 World. 



Fam. AULACIDiE, Slmch 



1. Trygonalys pictifrons. T. nitidus, niger, distincte pmictatus ; 

 capite pedibusque albo maculatis ; alis hyalinis, apice fuscis. 



Female. Length 5 lines. Black ; head and thora.K with coarse, shallow, 

 confluent punctures ; the mesothorax with two oblique longitudinal 

 impressed lines, which enclose, in the middle, one-third of the disk, the 

 lateral portions being irregularly striated longitudinally ; the scutellum 

 with a central depression, the metathorax rounded. The face with an 

 ovate spot outside the insertion of the antennae, two at the base of the 

 clypeus, and an oblong one at the inner margin of the mandibles, 

 white ; the head a little wider than the thorax. Thorax : the 

 tubercles, the anterior tibife in front, and the intermediate and pos- 

 terior pairs at their base, white ; wings hyaline and iridescent, with a 

 dark fuscous cloud at the apex, commencing at the stigma. Abdo- 

 men shining, more finely punctured than the head and thorax, the 

 base with a central longitudinal depression ; beneath, more delicately 

 and not quite so closely punctured. 



Male. Length .'i| lines. Closely resembles the female, but rather more 

 finely punctured ; the extreme base of the femora and apex of the 

 trochanters are pale, there is also a pale spot on each side of the scu- 

 tellum and of the postscutelhnn ; the second segment of the abdomea 

 LINN. PHOC— ZOOLOGV, SUPPLEMENT. 5 



