1 895.] ENTOMOLOGICAL NEWS. 1 99 



abdomen are at the base of segments 2-6; the one on segment 2 is rect- 

 angular and covers about two-fifths of the segment either way, each suc- 

 ceeding spot becomes transversely elongate, and longitudinally narrowed 

 until the one on segment 6 is quite narrow and less distinct than the 

 others. Wings transparent, iridescent. Antennae, except scape, black; 

 the body is smooth, shining and with very few punctures. Head small, 

 eyes comparatively large; mesonotum shows the trilobed structure, the 

 anterior lobe having a longitudinal groove in the centre of it; mesoster- 

 num much produced beneath, so that the mesothorax is at least twice as 

 deep as the metathorax; metanotum with two longitudinal caring and 

 one transverse carina near the apex ; tergum of abdomen uneven, the 

 white diamond-shaped spots raised and surrounded by a distinct crenu- 

 lated channel. 



One specimen collected in Florida by Mrs. Annie Trumbull 

 Slosson. 



There are seven species in the genus, and the following table 

 may serve as a guide in separating them : 

 Abdomen entirely black. 



Face and scutellum black. 



Posterior tibiae black at base canadeasis Prov. 



Posterior tibiae white at base truncata Prov. 



Face with white orbits, scutellum white annulipes Cress. 



Abdomen black, with large, central, elliptical, white spots on segments 2-6. 



alborhombarta n. sp. 

 Abdomen with the apical edges of the segments white. 



Posterior legs black with white annuli zonata n. sp. 



Posterior legs fulvous, oblique grooves on abdominal segments as in 

 Glypta pulchripicta A si mi. 



Posterior legs white pleuralis Ashm. 



-o- 



DESCRIPTIONS OF THE LARWE OF THREE SAW-FLIES. 



By HARRISON G. DYAR, A.M., New York. 



Trichiosoma triangulum Kirby.^ 



Larva. Large, like Cimbex. Head bright straw-yellow, rounded, 

 shagreened, not shiny; width 4.5 mm. ; a crease before apex of each lobe; 

 eye on a black spot; a point near it representing the antenna. Body 

 curled spirally, green, covered with white dots; segments about 8 annu- 

 late, the annulets and the true segmental incisures about alike; two larger 

 white dots on the subventral folds formed by an aggregation of small dots. 

 Spiracles invert-cordate, black. Thoracic feet large, pale, black tipped. 

 Abdominal feet present on joints 6-12 and 13, pale green. Body higher 

 than wide, slightly smaller posteriorly. 



Larvae not uncommon on the willow and wild cherry at Keene Valley, 

 N. Y., in the Adirondacks. They closely resemble the larva of Ciinbex 



