482 PROCEEDINGS OF THE ACADEMY OF [1893. 



the hind margin from which place it goes forward to about the middle of 

 the segment and then back again to the hind margin (this is more 

 distinct in some specimens than in others); pygidial area with a few 

 large punctures; black; the last three abdominal segments bright red; 

 face, clypeus, thorax, especially beneath and the legs with a short, 

 appressed, fusco-sericeous pile ; wings fuliginous, iridescent, nervures 

 black ; width of the second submarginal cell above less than the 

 space between the recurrent nervures on the cubital nervure. Length 

 17-21 mm. 



New York to Florida, westward to Kansas. The deep black and 

 bright red abdomen gives this species a very striking appearance. 



2. — L. Cressonii Fox. 



L. americana Cr., (nee. Sauss).Tr. Amer. Ent. Soc. IV, p. 214. $ . 1872. 



$ . — Clypeus sub- truncate medially, distinctly punctured, most 

 closely so posteriorly ; first joint of Hagellum not over one quarter 

 longer than the second, the latter is a little longer than the third ; 

 front and vertex rather coarsely punctured, most sparsely so on the 

 vertex ; space between the eyes at the top nearly equal to the length 

 of antennal joints 2-4 united; dorsulum strongly and densely punc- 

 tured; scutellum distinctly impressed; metanotum more strongly 

 punctured than in analis, and the medial raised line is longer, ex- 

 tending about half the length of the metanotum ; metapleura? more 

 finely punctured than the dorsulum ; tibiae and tarsi tolerably well 

 armed with spines ; abdomen sub-opaque, very finely and closely 

 punctured, no transverse rows of coarse punctures as in analis; black; 

 face, clypeus, cheeks, thorax and legs more or less, with silvery pu- 

 bescence; apical margins of dorsal abdominal segments 1-5 with 

 silvery pile; wings fuliginous, iridescent. Length 11-16 mm. 



Pennsylvania to Louisiana. May be the male of analis, though 

 scarcely probable. 



UNIDENTIFIED SPECIES. 



Larra laevifrons Sm. 



Larrada laevifrons 8m., 1. c. p. 291. 

 Larra laevifrons Kohl, 1. c. p. 245. 



" 9 . — Length \\ lines. — Head and thorax black ; the face thinly 

 covered with silvery pubescence; the vertex with merely a slight 

 elevation above the anterior ocellus, with two smooth spaces behind, 

 between them a smooth, shallow channel which passes a short way 

 upwards towards the vertex terminating in a smooth fovea. Thorax 



