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8. A new Microvelia from Argentina. 
Microvelia mendozana n. sp. (Fig. 4): Dull. Upper side 
of head sordid pale, with blackish streaks. Pronotum 
blackish, anterior margin pale. Wing covers brownish 
dark; membrane with 3 whitish spots. Antenne pale, 
but darkened towards apex. Legs entirely sordid pale. 
Ist and 2nd joints of antennz stout, 
7 much thicker than 3rd and 4th, which are 
ik slender and very elongate; 2nd joint the 
shortest of all, gradually thickened towards 
apex, much shorter than Ist joint; 3rd joint 
å distinctly longer than Ist; 4th joint the 
eo eerdr longest of all, a little longer than 3rd joint. 
mendozanan.sp. Pronotum nearly pentagonal; anterior half 
a antenna: 
b pronotum rather abruptly sloping; hind process large, 
mas. With rounded tip; in front of the process 
Greatly enlarged. a slight median keel is perceptible; ante- 
lateral outlines of pronotum feebly incurved. Ist joint of 
fore tarsi much shorter than the 2nd; joints of hind tarsi 
subequal in length. Long. 1.3 mm. 
One macropterous specimen from the Province of 
Mendoza, Argentina. 
a 
9. The prey of Stiretrus erythrocephalus 
Lep. et Serv. 
The above named Stiretrus occurs frequently in Western 
Argentine, in the Province of Mendoza, on the bushy 
Baccharis salicifolia and allied species. It was especially 
often found near Estacion Santa Rosa. A chrysomelid 
beetle, Phedon Buquetii Dej., feeds on the said Bac- 
charis, and this proved to be the reason, why the Sfirefrus 
was found on it, as the hemipteron preyed not only upon 
the beetle, but also upon its larva. 
As a fact worthy of notice I may add that this Stiretrus 
strongly mimics the Phædon, not only regarding size and 
general shape of body, but also and especially as to the 
