40 



PSYCHE. 



[March ,S>,7. 



fourth and fifth segments eacli with four of 

 these sub-square black markings united along 

 front border, sixth segment wholly black. 

 Abdomen thinly yellow-hairy. Legs yellow, 

 the hips, knees, ends of tibiae, and whole of 

 tarsi black, except middle and hind metatarsi 

 and next tarsal joint which are yellow, only 

 the distal ends being black. Wings with the 

 first basal cell more than half clouded prox- 

 imally, the second basal cell less than half, 

 the anal cell not at all except narrowly in dis- 

 tal end, the two basal cells beirvg also clouded 

 in distal ends. The distal ends of the mar- 

 ginal and first submargiiial cells with an 

 apical cloud, which extends into the second 

 submarginal cell. The median broad black 

 cross-band of wing invades slightly more 

 than the proximal half of the first submar- 

 ginal and first posterior cells, the whole of 

 discal cell, less than proximal half of second 

 posterior cell, about half of third posterior, 

 all but the distal end of fourth posterior, and 

 hardly the proximal half of fifth posterior, 

 besides also the distal ends of the anal and 

 basal cells as above mentioned. The clear 

 portion of basal half of wing is whitish, ex- 

 cept for the broad border of anal angle which 

 is very faintly cloudy; likewise there is a 

 white distal border to the middle transverse 

 band, leaving the clearer portion of apical 

 half of wing also very faintly clouded. Hal- 

 teres yellow. 



Eri stalls latifrous Loew. IIe;icl of 

 East Folk. D-D-Bar lanch. July 22. 

 Three (Js, and one 9 . Length, 10 to 

 13 inm. The $ i, are all the normal 

 form, without cloud on the wings and 

 with the lateral triangles of second ab- 

 dominal segment distinctly yellowish. 

 The 9 , however, belongs to the vari- 

 ety mentioned by me in Trans. Am. 

 Ent. Soc, xxii, p. 49. It has the con- 

 spicuous cloud on the wings, and the 

 triangles of second segment are pale 



brownish, but showing yellowish on 

 inner angle. The opaque inteniipted 

 fascia of third segment is obsolete in 

 this specimen. 



Chrysochlamys croesus O. S. West 

 Fork. July 12. Two 9 s. Length, 10 

 to u mm. They agree well with 

 Williston's description (Syn. Syrph.). 



Dejeania corptilenta VV^ied. West 

 Fork. July 16. One 9 . Length, 15 

 mm. The frontal bristles do not descend 

 more than one or two below base of 

 antennae. Ground color of head and 

 thorax rich brassy-golden or pale old 

 gold, the palpi several shades darker 

 than head and thorax but still soine- 

 what lightei- than the reddish-yellow 

 legs. Otherwise it agrees well with 

 V. D. Wulp's supplementary descrip- 

 tion in Biol. C. A. Dipt., ii, p. 10. 



jMyohIa gile7isis n. sp. West Fork. 

 July 16. One $. Length, S mm. 

 Near M. diadoiia Wd.. and M. flavi- 

 pennis Wd. 



(J. F"ace and front silvery-white, frontal 

 vitta rusty-golden. Antennae yellow, distal 

 half of third joint and all of arista dusky 

 brownish. Third antennal joint two or three 

 times as long as second. Palpi reaching 

 nearly to epistoma, slender, yellowish. Pro- 

 boscis slender, yellowish on basal half, dusky 

 brownish apically. Front at vertex about 

 one-sixth width of head, widened before base 

 of antennae. Frontal vitta fully as wide as 

 sides of front. Face receding, epistoma 

 prominent. Cheeks and underside of head 

 silvery. Occiput cinereous, golden near ver- 

 tex. Thorax cinereous, humeri and pleurae 

 more silvery. A very faint brassy shade to 

 thorax, scutellum quite golden. Four strong 

 bristles on margin of scutellinn. Abdomen 

 yellow, second and third segments with a 



