30G I'HOCEEDINGS OF THE NATIONAL MUSEUM. 



first posterior cell; a sixth in second basal cell beyond tbe middle, con- 

 tiguous to the fifth vein; a seventh in anal cell near its middle, finally 

 one in each outer angle of tlie axillary cell; a distinct brown cloud at 

 base of the third vein, another at the stigma, and a third larger one, 

 filling the outer ends of tlie marginal and submarginal cells. Length, 

 32 mm. A single specimen (No. 032). 

 Type.—^o. 3900, U.S.N.M. 



PACHYRHINA VIRGATA, new species. 



Male: Head oi)afjue, yellow, the rostrum polished, the upper side of 

 the front i)art reddish, a black spot on the occiput above the neck, 

 palpi yellow, antennae brown, the first two joints yellow, joints 4 to 10 

 greatly constricted near the middle of their under sides (the apical por- 

 tion of the antennae wanting in the single specimen before me). Tho- 

 rax i)olished, yellow, mesonotum marked with three black vittae, of 

 whi(;h the median tai)ers ])Osteriorly and does not extend l)ehind the 

 suture; the lateral ones each consist of two contiguous lunate spots, an 

 oi)aque brown spot on the outer side of the anterior end of each, 

 another on the suture and a third on each side of the prothorax; scu- 

 tellura black, a black dorsal vitta on the metanotum. Abdomen yellow, 

 marked with an interrupted black dorsal vitta. Legs yellow, apices of 

 the tibiae and tlie whole of the tarsi, brown. Haltcres yellowish. 

 Wings hyaline, subcostal cell yellowish, stigma brown. Length, 

 13 mm. A single specimen (No. 037). 



Type.—^o. 3907, U.S.N.M. 



PACHYRHINA PALLORIS, new species. 



Female: Differs from the above description of rir(/ota only as fol- 

 lows: Black spof on the occiput reduced to a narrow vitta (antennae, 

 except the two basal joints, wanting). Vittae of the thorax pale 

 brown, the outer ones interrupted at the suture by a lunate velvet- 

 black spot, the spot on the outer side of their anterior ends also vel- 

 vet-black, prothoiax unmarked, scutellum yellow, metanotum, except 

 on the sides, yellowish-brown, a large yellow dorsal spot contiguous to 

 the scutellum. Abdomen marked with a black vitta each side, in 

 addition to the dorsal one. Wings having the costal and subcostal 

 cells brown, the apex of the wing from slightly before the apex of the 

 second vein to the apex of the fifth narrowly bordered with brown, the 

 apices of the veins terminating in this part of the wing also narrowly 

 bordered with brown. Length, 19 mm. A single sj)ecimen (No. 037). 



Type.— No. 3908, U.S.N.M. 



Family BIBIONIDAE. 



BIBIO LEPIDUS Loew. 



Bibio lejndas LoEW, Sys. Hc^sdi. Knr. Zweif. lus., 1871, II, p. 32. 



Four male specimens (No. 099), agreeing well with the description, 

 which was founded on specimens from Great Britain. 



