No. 2361. DESCRIPTIONS OF NEW SAWFLIES—ROHWER. 85 



longitudinal furrow on outer surface; sheath straight above, nearly 

 truncate apically, rounding to rather narrow base. Black, with 

 yellow markings and a red abodmen; head yellow, antennae, apices 

 of mandibles, band from bases of antennae (where it is tridentate and 

 broader) to occiput, where it meets two oblique lines from top of eye, 

 and the posterior face black; thorax black, prostemum, anterior and 

 posterior angles of pronotum, tegulae, a spot above, spot on pre- 

 scutum, two spots of scutum in front of scutellum, spot on mesepi- 

 sternum and two spots on mesosternuin yellow ; legs yellow, bases of 

 coxae, the femora and apices of hind tibiae black; abdomen rufous, 

 propodum, base of second tergite and the sheath black, sides of 

 second, third, fourth, fifth, eighth, and a small spot on ninth tergites 

 yellow; wings hyaline, venation, except reddish costa, black. 



Male. — Because of the shape of the prescutum the male would fall 

 in with abdominalis, but it is larger than that species ; the legs are 

 stouter and the head immediately above the antennae more coarsely 

 sculptured. 



Length, 10 mm. The structure and markings of female except 

 where noted. Antenna 15-jointed, second joint a little more than 

 half as long as third and somewhat shorter than the fourth, the two 

 basal joints reddish; postocellar line subequal with the ocellocular 

 line; black of the head more extensive; upper part of mesepisternum 

 spots on metapleura and propodeum yellowish; legs rufous, coxae 

 except black bases yellowish; eight and ninth tergites without yel- 

 low; hypopygidium with an arcuate, median emargination ; sternites 

 five to eight, with black hair; tibia not as constricted as in female or 

 as strongly compressed. 



Paratype a has the black of the head greatly reduced, the entire 

 venter and sides of thorax, sternites and margins of tergites and legs 

 yellow. Paratype b has the antenna 16-jointed and mostly pale, the 

 yellow thorax, legs and abdomen of paratype a and has the head, 

 except posteriorly and a spot around the ocelli, yellow. The yellow 

 on the mesonotum is more extensive than in any other specimen. 



Since preparing the above more material has been received which 

 indicates that paratype a is the typical color for the male. There is 

 very little variation in the female. 



Type locality. — Harrisburg, Pennsylvania. 



Described from three females (one type) and twelve males (one 

 allotype) reared May 26, 1919, from wood of Carpinus caroliniana,. 

 Material collected and reared by A. B. Champlain, for whom the 

 species is named. 



Type, allotype, and paratypes. — Cat. No. 22365 U.S.N.M. Para- 

 types (female and male) returned to Bureau of Plant Industry, 

 Harrisburg, Pennsylvania. 



