DESCRIPTIONS OF NEW SPECIES AND VARIETIES. 87 



ERIOSOMA ULMI, N. Sp. Color dark bine. Length to tip of closed wings, exclusive 

 of antenna?, 0.12 [inch, =3 mm ]. Wings hyaline, three times as long as wide, and more 

 pointed at the ends than in E.pyri. Costal and subcostal veins, and that bounding 

 the stigma behind, robust and black. Discoidal veins together with the 3d forked 

 and stignial veins, all slender and black, the forked vein being as distinct to its base 

 as are the others, with the fork but as long as the vein itself and curved in au oppo- 

 site direction to the stigmal vein. Anteume C-joiuted and of the same color as the 

 body; joints 1, 2, 4, 5 and 6 of about equal length, joint 3 thrice as long as either. 

 Legs of the same color as body. 



The young lice are narrower and usually lighter colored than the mature individ- 

 uals, varying from flesh or pink to various shades of blue and purple. [First Rept., 

 p. 124. 



Professor Thomas (Trans. 111. St. Hort. Soc,, 187G, p. 191) has called 

 it Erisoma EUeyi* because of ulmi being' preoccupied by au European 

 species. It belongs to Scliizoneura. For subsequent remarks see 

 "Notes on the Aphidida? of the United States, etc., by C. V. Riley & 

 J. Monell," (Bull. Harden 1 * U. S. Geol. & Geogr. Survey, Vol. V, No. 1, 



p. 3.) 



DIPTERA. 



ASILUS MISSOURIEXSIS N. SP. Alar expanse 1.85 [inches, = 4? mm ] ; length of body 

 1.30 inches [=33 mm ]. Wings transparent, with a smoky yellow tinge, more distinct 

 around the veins, which are brown. Head pale yellow, sometimes brownish ; mous- 

 tache straw-yellow with a few stiff black hairs below; beard pale straw-yellow; 

 crown very deeply excavated ; base of the same pale yellow with short, stiff, yellow- 

 ish hairs, and a crown of black ones near the border; eyes large, prominent, finely 

 reticulated and almost black : antenna 1 , first joint black tipped with brown, cylindri- 

 cal and hairy ; second joint black, short, thick and rounded at tip, with a few stiff 

 hairs: third joint as long as first, tapering each way, smooth, black and terminating 

 in a long, brown bristle ; proboscis black and nearly as long as face ; neck with pale 

 and black hairs. Thorax leaden-black, slightly opalescent with reddish brown at 

 sides, more or less pubescent with pale yellow, especially laterally and posteriorly and 

 in three narrow longitudinal dorsal lines which gradually approach towards meta- 

 thorax ; bearded at sides and behind with a few decurved black bristles, those behind 

 ^terspersed with a few smaller pale hairs ; scutel of the same color, with upward- 

 curving, black bristles; halteres brown. Abdomen, , general color dull leaden-yel- 

 low, with darker transverse bands at iusections ; the light color produced by a yellow- 

 ish pubescence and numerous short close-lying yellow hairs, the dark bauds produced 

 by the absence' of this covering at the borders of each segment ; basal segment broad, 

 bilobed, and with lateral black bristles ; segments 6, 7, and anal valves with a de- 

 cided pink tint, especially 7 ; 8 but one-third as long as 7 above. 9 , broader, flatter, 

 more polished and brassy, with no transverse darker bands, segments 7 and 8 polished 

 black, the latter narrow and longer than any of the others ; anus with a few black 

 bristles. Legs, dull purple-brown, with black bristles ; thighs very stout, the hind 

 pair rather darker than the others, the two front pair of trochauters with long, yel- 

 lowish hairs ; pulvilli, generally fulvous. 



Described from two $ , and two 9 all captured while sucking honey-bees. I have 

 not access to Loew's descriptions, and cannot therefore compare it with already de- 

 scribed species; but specimens have been sent to Dr. Win. LeBaron, of Geneva, Illi- 

 nois, and to Baron Osten Sacken, of New York, and both these gentlemen are unac- 

 quainted with it, and believe it to be new. In the well marked $ specimens, the 

 body bears a general resemblance to that of Trupanea [Promachus] vertebrate-, Say. 

 [Second Rept,, pp. 122-123. Fig. 89. 



* By typographical error Bilepi. 



