216 PROCEEDINGS OF THE ACADEMY OP 



Thorax honey-yellow, shining, with three dark hrown stripes ; the interme- 

 diate one is capillary and does not reach the scutum ; the lateral ones are ab- 

 breviated before and extended over the scutum behind ; scutellum dark brown 

 with a yellow line iu the middle ; metathorax brown ; pleurae with a brown 

 stripe running from the base of the wing to the intermediate coxae ; a large 

 brown spot anterior to the base of the halteres ; the latter pale yellow, faintly 

 infuscated in the middle of the stem ; feet yellowish-tawny with two brown 

 rings on the femora, but a little beyond the middle ; the other near the tip ; 

 tip of tibia? and tarsi infuscated. Abdomen brown ; base of the second and 

 the following segments broad yellow ; (J 1 forceps like fig. 7. Wings yellowish ; 

 stigma fuscous ; central cross-veins clouded with fuscous ; the tip of the po- 

 brachial vein, the externo-medial veins and the lower discal cross-veins like- 

 wise margined with fuscous ; fuscous spots about the middle of the praebra- 

 chial, pobrachial and anal areolets, forming an interrupted band across the 

 wing ; in some specimens they are indistinct. 



Maine (Mr. Packard,) Upper Wise. River (Mr. Kennicott,) Washington, in 

 the Spring, (nob.) 



Eight (j 1 9 specimens. 



L. triocellata. Ferruginea, thorace lineis et punctis nigTis ; alae fla- 

 vescentes, ocellis tribus parvis fuscis ; long. lin. 3^ 4. 



Proboscis and palpi brown ; antennae pale ferruginous ; front slightly hoary ; 

 vertex pale ferruginous. Thorax ferruginous ; collare long, with a longitudinal 

 brown stripe in the middle ; praescuturn shining ; two short, brown lines near 

 the collare and four brown spots before the suture ; a brown spot on the humerus 

 pleurae pale ferruginous, slightly hoary, with two or three brown dots between 

 the anterior coxae aud the root of the wing ; two lines in the middle and a spot 

 on each side of the scutum ; metathorax with brown marks in the four corners ; 

 halteres pale, with brown knobs ; feet ferruginous, hairy ; tips of the femora 

 and last joint of tarsi brown. Wings tinged with yellow ; space between 

 costal and subcostal veins more saturate yellow ; a small brown spot near the 

 basis, between the subcostal and prasbrachial veins ', a brown ring at the origin 

 of the petiole ; another smaller one at the origin of the fork ; a third sometimes 

 indistinct one at the posterior end of the stigma ; its anterior end is marked 

 with a brown spot ; a brown shade on the margin of the wing, between the 

 stigma and the apex ; tips of the longitudinal veins clouded. 



Washington, Trenton Falls, in July and August (nob.) ; Upper Wisconsin 

 River (Mr. Kennicott.) 



L. tristigma. Pallide ferruginea, thoracis vitta f usca, alis flavescentibus, 

 punctis quatuor marginalibus pallide fuscis, femoribus annulis duobus fuscis ; 

 long. lin. 4 5^. 



Head, proboscis aud palpi black ; front slightly hoary ; the first joint of the 

 antennae black at the root, yellow towards the tip ; the following four or five 

 joints pale yellow, the rest of the antennae brown. Thorax pale ferruginous, 

 a broad, brown stripe on its anterior part ; it is linear on the collare and 

 cuneiform on the praescutum, the point not reaching the suture ; halteres 

 yellow, slightly brownish at the tip ; feet yellowish, tawny ; femora with two 

 brown rings, one beyond the middie, the other near the tip. Abdomen yellow. 

 Wings yellowish, the interval between the costal and subcostal veins more 

 saturate yellow ; stigma pale ; four pale brown dots along the anterior mar- 

 gin ; the first at the origin of the petiole ; the second at the mediastinal cross- 

 vein ; the third at the anterior, and the fourth at the posterior end of the 

 stigma ; the second is generally the most distinctly marked, the others being 

 sometimes almost obsolete ; the mediastinal cross-vein is at the tip of the 

 mediastinal vein ; the stigmatical cross-vein is in the middle of the stigma. 



Five (J 1 and six <j? specimens from Northern Illinois (nob.) 



[Aug, 



