Vol. XXVIII, pp. 83-86 April 13, 1915 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW SPECIES OF PIPUNCULUS. 

 [Diptera; Pipunculid^.] 



BY FREDERICK KNAB, 

 Bureau of Entomology. 



The species described in the following were reared during 

 investigations conducted by Prof. H. H. Severin from sugar-beet 

 leaf -hoppers parasitised by the larvae. They are briefly char- 

 acterized herewith, in order that the names may be used in 

 presenting the results of the investigations. 



Pipunculus industrius new species. 



Male. — Frons a narrow wedge extending about one-third the way to 

 posterior eye-margin, silvery pollinose; ocellar triangle small and narrow, 

 shining black. Face silvery pollinose, slightly broader than base of 

 frons. Antennae black, the third joint acuminate, its apex white and 

 drawn out to a sharp point; arista black. Occiput shining black, finely 

 shagreened; the sides silvery poUinose. Mesonotum black; shining and 

 slightly shagreened on the disk, dusted with gray anteriorly, at the sides 

 and in the prescutellar groove; humeral angles pale. Scutellum shining 

 black ; postnotum gray pruinose. Pleurae black dusted with gray. Ab- 

 domen narrowed at base, swollen beyond; black dorsally, the posterior 

 half shining and roughened, on the sides dusted with gray ; first segment 

 with the posterior half gray pollinose and with two or three stiff black 

 bristles at the sides. Hypopygium large and broad, nearly symmetrical 

 in dorsal view, broader and longer than the fifth segment, broadly 

 rounded posteriorly, slightly angulate on the right side, a shallow 

 impression on the middle of the posterior aspect; intermediate lobe 

 visible on the right side as a large broad wedge. Legs black, the 

 extreme apices of the femora, bases of the tibiee broadly and apices more 

 narrowly yellowish, the yellow more extensive on anterior pair; tarsi 

 brown, darkened distally; hind trochanters unarmed, with sparse deli- 

 cate hairs on under surface; hind tibiae rather slender, on outer surface 

 with a row of fine spines close to upper and lower margins ; first tarsal 

 joint somewhat thickened. Wings grayish hyaline, rather long; a long 



12-Proc. Biol. Soc. Wash., Vol. XXVIII. 1915. (83) 



