ICHNEUMON-FLIES — GELINAE : MESOSTENINI 109 



Highlands at 3,800 ft.); Ohio (Puritas Springs in Cuyahoga Co., 

 Put-in-Bay, and Shaker Heights); Ontario (Bells Corners, Ottawa, 

 Thunder Bay Beach, and Waubamick); Pennsylvania (Carlisle and 

 Jeannette); Quebec (Georgeville) ; Vermont (I^aurel Lake near Jack- 

 sonville); Virginia (Galax and Skyline Drive); and Wisconsin (Door 

 Co. and Milwaukee). 



Collection dates are mostly during June, July, and August. Those 

 outside of this range are: May 5, 27, and 29 at Ann Arbor, Mich.; 

 May 26 and 31 at Highlands, N.C.; May 31 at Ithaca, N.Y.; Septem- 

 ber 2, 4, 8, 12, 19, and 23 at Ann Arbor, Mich.; September 6 at Ta- 

 koma Park, Md. ; and September 22 at Bolivar, W. Va. 



Our own collections were largely in fields overgrown with bushes and 

 at the edges of woods. There are no host records on the pin labels 

 of the specimens at hand, but Graenicher reared it from nests of 

 Ceratina dupla and reported on its biology (1905, Ent. News, vol. 16, 

 pp. 43-49). According to his observations, the egg of the parasite is 

 laid in the cell of a bee, on top of the bee's egg. The parasite larva 

 hatches first and for about 8 days, until the bee larva is about half 

 grown, feeds very little. Then it feeds rapidly, Idlling this bee larva 

 and invading one to four adjacent cells and consuming their larvae 

 also. It then spins a flimsy cocoon, pupates, and becomes an adult, 

 in all about 30 days from the time the egg hatched. 



This species occurs in the Alleghanian Fauna. 



5. Aritranis nubecula, new species 



Front wing 4.5 to 6.5 mm. long; clypeus weakly, evenly convex, 

 its apical margin very wealdy arcuate and with a very weak blunt 

 median tooth; thorax of moderate stoutness; mesoscutum somewhat 

 mat, with medium sized, strong punctures; apical carina of propodeum 

 strong, forming very weak sublateral crests, its median part bowed 

 forward; areolet pentagonal, of moderate size; second recurrent form- 

 ing a 90° angle with first abscissa of subdiscoideus; first tergite of 

 moderate length, without a basolateral tooth but in female with a 

 narrow rounded flange in lieu of a tooth; median dorsal carina of 

 first tergite strong from base nearly to apex; dorsolateral carina of 

 first tergite strong beyond the spiracle, weak basad; second tergite 

 strongly mat, with medium sized, moderately strong punctures that 

 are separated by about 0.7 their diameter; ovipositor sheath about 

 0.36 as long as front wing. 



Male: Head black, the face, frontal orbit, cheek, clypeus, and 

 lower 0.7 ± of temple white, more or less of the upper 0.3 ± of tem- 

 poral orbit often fulvous; mouth parts white; antenna black, the 

 scape Ught brown except above; thorax ferruginous, much of propleu- 

 rum and prepectus, margins and notauli of mesoscutum, and area 



