258 A. L. MELANDER. 



2. Posterior femora brown ; antennse short ; liypopygiuni open. 



disparilis sp. uov. 

 Femora yellow ; anteunse longer ; liypopygium comparatively closed. 



coinpta Coquillett. 



lieptopeza flavipes Meigen (Fig. 68). 

 Syst. Bescbr., ii, 353. 



Shining black, antennae piceous, palpi yellow. Legs yellow, with brown tarsi, 

 of the hind legs the coxfe, tips of the femora and the tibiae brown ; halteres yel- 

 low. Wings brownish. 4 mm. 



Europe and North America. 



One male ; Dixie's Landing, Virginia. The wings are tinged 

 with brown and the halteres are infuscated. The antennae are 

 much lengthened. The abdomen is piceous, with the apical mar- 

 gins of the segments black. The hypopygium is devoid of* long 

 hairs and is closed, its parts not so distinctly visible. 



Leptopeza disparilis sp. uov. (Fig. 69). 

 Male. Length 4.5 mm.— Shining black. Antennae black, a little shorter than 

 the arista, third joint elongate, conical; antennae one-fourth the head-height. 

 Palpi and proboscis blackish brown. Postocular bristles black, cilia whitish. 

 Thorax and abdomen with yellowish hairs and bristles. Hypopygium terminal, 

 its parts distinct, filaments exposed, curved on the right side, straight on the left 

 side, lower cleft shorter than the upper. Hind coxae brownish, fore and middle 

 coxae, femora and tibiae yellow, tarsi dusky from first joint, posterior femoi-a and 

 tibiae brown, the tibiae and metatarsi swollen, middle tibiae with a series of thiee 

 (four) long bristles on the outer side. Halteres light yellow. Wings hyaline, 

 veins rather strong fuscous, no stigmal darkening. 



Five males ; California, Idaho. 



This species is larger and more robust than the others. 



Leptopeza coinpta Coquillett (Fig. 70). 

 Proc. Nat. Mus., 1895, p. 435. 



Head black, gray poUinose, eyes contiguous; antennae yellow, third joint elon- 

 gate oval, twipe as long as broad, the arista black and nearly as long as the an- 

 tenna ; proboscis and palpi yellow, proboscis less than one-third as long as the 

 height of the head. Thorax, pleurae, scutellum and metanotum yellow. Abdo- 

 men blackish brown, the first segment, narrow lateral margins and front margin 

 of each segment yellow; venter yellow. Legs slender, light yellow, including 

 the coxae. Halteres light yellow. Wings grayish hyaline, stigma wanting. 4 mm. 



New Hampshire, Massachusetts. 



Numerous specimens of both sexes in the collection from Ohio, 

 Tennessee, Illinois, Wisconsin and Idaho. The color varies from 

 completely yellow, except the head and three basal spots on the 

 abdomen black, to completely black, except the venter, coxae and 



