276 MAINE AGRICULTURAL EXPERIMENT STATION. I9II. 



and thorax taken together; the fore tarsi about 1.75 times as 

 long as the tibia, the fore tibia about 1.5 times as long as the 

 metatarsi. Wings grayish hyaline with brown veins ; costa pro- 

 duced far beyond the tip of Rs ; petiole of the media about 

 twice as long as the crossvein; Sc^ distad of the middle of Sci; 

 Sci ends opposite the base of Rs ; cubitus forks under the cross- 

 vein or sometimes opposite its proximal end. "Greenland and 

 N. H." 



According to Riibsaamen one claw of each foot is modified 

 scoop-shape, fluted and with serrate margin. I have female 

 specimens from Maine and New York which appear to belong 

 here. According to a figure given by Dziedzicki the hypopy- 

 gium resembles that of B. obsciira but the forceps are differently 

 formed (Fig. 156). 



Some female specimens from California and Wyoming re- 

 semble this species but differ in having longer fore tarsi. 



17. Boletina delicata n. sp. 



Male. Length 3 mm. Head, including mouth parts, basal 

 antennal joint black (flagellum broken). Thorax and abdomen 

 black, subopaque, with yellow hairs. Hypopygium black, re- 

 sembling that of obscnra but with different forceps (Figs. 159, 

 160) and terminal appendages (Fig. 158). Coxse, femora, tibise 

 and tibial spurs yellow, tarsi brownish ; claws broad, digitate, 

 digits contiguous, outer digit shorter and free. Wings grayish 

 hyaline, veins dusky yellow (Fig. 188). Halteres yellow. 

 Jackson Lake, Wyo., Sept., (W.M.W.) 



18. Boletina ohesula n. sp. 



Female. Length 5.5 mm. Head, including mouth parts, 

 and antennae, black ; intermediate antennal joints about twice 

 as long as broad. Thorax black; abdomen dark brown with 

 posterior margins of both dorsal and ventral sclerites of seg- 

 m^ents 3 and 4, and lamellae of ovipositor, yellow. Immediate 

 base of fore, basal 2-3 of middle and hind coxse, and trochan- 

 ters dark brown ; femora and tibi^ 3'ellow, tarsi brown ; tarsal 

 claws all similar, with basal teeth. Wings grayish hyaline, 

 anterior veins strong, dark. (Fig. 189). Head of Tsirku 

 River, Alaska, July-Aug., (O. M. Leland). 



