AMERICAN ENTOMOLOGY. 15 



Desc. Head golden-yellow, black at base of the antennae and 

 in a line proceeding to the month ; hypostoma very slightly in- 

 dented, carinated; antennae ochraceous; eyes chestnut; thorax 

 dark brassy ; with two cinereous lines confluent before, attenu- 

 ated behind, and abbreviated behind the middle ; an obsolete in- 

 terrupted line each side over the wings ; scutel on the posterior 

 margin ochraceous ; pleura and pectus with a pale glaucous cover- 

 ing; feet ochraceous, thighs black at base; posterior pair black- 

 brassy, their thighs dilated, with spines beneath, placed irregu- 

 larly; a prominent projecting angle near the tip; tergum black; 

 basal segment on the lateral margin ochraceous ; second segment 

 with a large subquadrate ochraceous spot each side, approaching 

 the middle, where it is longer than on the margin, posterior edge 

 ochraceous ; third segment with also a large subquadrate ochra- 

 ceous spot each side approaching the middle where it is longer 

 than on the margin, it reaches the basal suture, posterior edge 

 ochraceous ; fourth segment ochraceous at tip ; venter yellowish- 

 white, blackish at tip. 



Obs. This specimen is a female, and was captured in Pennsyl- 

 vania. By its form of body, and the character of the hypostoma, 

 it approaches the genus Humerus Meig. 



The upper right figure of the plate. 



[This species belongs to the genus Tropidia Meig. — Sacken.] 



Xylota ejunctda. — Specific character. Blackish; tergum 

 with four semioval, subequal, ochraceous spots ; posterior thighs 

 rather slender, with two series of black spines beneath. 



Desc. Head silvery ; antennae ochraceous ; eyes chestnut ; tho- 

 rax greenish-brassy, with a greyish spot on each side before ; 

 poisers and scale whitish ; feet whitish, two last joints of the tarsi 

 black ; thighs piceous, with a slight brassy tinge, posterior pair 

 not remarkably dilated, exterior series of spines nearly equal 

 from near the base to the tip ; posterior tibia piceous at tip ; ter- 

 gum black, with a slight tinge of green ; basal segment polished, 

 immaculate ; second and third segments each with a large semi- 

 oval ochraceous spot on each side, approaching the middle and 

 attaining to the lateral edges, but not reaching either the base or 

 tip of the segment ; fourth segment obscure, brassy, polished ; 

 venter yellowish-white, black at tip. 



Obs. The specimen is a male. I caught it on the banks of 

 the St. John's river, in East Florida, during a short visit to that 



