AMERICAN HYMENOPTERA. 419 



A CONTRIBUTION TO THE KNOWLEDGE OF THE 

 PARASITIC HYMENOPTERA OF ARGENTINA. 



BY P. CAMERON. 



The species of Parasitic Hymenoptera described in this 

 paper were taken by Messrs. A. C. Jensen-Haarup of Silke- 

 borg, Denmark, and P. Jorgensen in 1904-5 and 1906-7 in 

 Western Argentina chiefly, near Mendoza. Some remarks 

 on the climate and vegetation, particularly in relation to the 

 Hymenoptera will be found in a paper in the Danish publica- 

 tion " Flora og Fauna," 1908, pp. 95-111, by Mr. Jensen- 

 Haarup. Very little has been written on the Parasitic 

 Hymenoptera of Western Argentina. It is therefore not 

 surprising that most of the species (thirty-six species includ- 

 ing seven new genera) are undescribed. 



CHALCIDID^. 



LEUCOSPIDIN^E. 



1. Leucospis pulchriceps sp. n. 



Black, densely covered with a silvery pile, the head, metanotum 

 and, to a less extent, the mesonotum, with firey red, coppery and green 

 metallic tints, the basal two or three joints of the antenna? and the 

 others to a less extent beneath, and a large squarish mark on the sides 

 of the pronotum at the base, rufous ; the pronotum with a transverse 

 line, narrowed outwardly, near the apex, a slightly wider transverse 

 line, not reaching to the outer edge, on the apex of the mesonotum, a 

 narrower curved line on the apex of the scutellum, a mark on the 

 centre of the mesopleuree at the base, roundly narrowed above, trans- 

 verse below ; the post-scutellum, a broad line, widened inwardly extend- 

 ing from the sides to near the middle, a broader, continuous line on 

 the base of the third segment, obliquely narrowed on the outer edge, 

 a narrow slightly curved line, on the centre of the hind coxa? above, a 

 line narrowed towards the base, on the upper outer edge of the hind 

 coxse, a broader one, narrowest on the apical half, a thin line on the 

 upper outer edge of the fore femora and the fore tibiae below, yellow. 

 Hind femora with a large basal triangular tooth, followed by ten short, 

 thick black ones closely pressed together, especially towards the apex ; 

 the basal two small ones are shorter than the others, and the second 

 small one is distinctly narrower and shorter than the first. The ovi- 

 positor is reddish in the middle, its apex reaches to the apex of the 



TRANS. AM. ENT. SOC, XXXV. DECEMBER, 1909 



