144 



ME LANDER AND BRUES. 



[Vol. I. 



Fig. 20. — D. renides- 

 cens : male wing 

 and lamella. 



broad. Antennae dull black, sericeous, short, with slender, dark, sericeous 

 arista, once and a half the length of the antenna ; third joint a little shorter 

 than the first two together, broadly oval, rounded but obtusely pointed at 

 apex; second joint with circlet of hairs. Front violet. Upper seven of 

 postocular cilia black, rest pale yellow. Thoracic dorsum bluish-green, 

 brilliantly shining except for indications of longitudinal dusted rows ; scu- 

 tellum and ante-scutellar region purer green. Abdomen shining green, 

 with brassy tinge, lightly dusted. Pleurae glaucous on a green foundation. 

 Middle and hind coxae, except tip, and extreme base of fore coxae of same 



color as pleurae. Front coxae with black 

 pubescence on anterior face. Legs largely 

 yellow, the hind femora with two ante- 

 apical bristles ; fore and middle legs dark 

 from tip of first tarsal joint ; hind tarsi 

 black, hind tibiae infuscated at tip. 

 Wings hyaUne, normal, a slight sinus at 

 tip of fifth longitudinal. Tegulae yellow 

 with rather long black cilia. Halteres yellow. 



Ma/e. Face ferruginous. Hypopygium piceous with brassy 

 green tinge ; sericeous below, shining inwardly ; internal ap- 

 pendages yellow. Lamellae clavate, broad, white translucent, 

 rather broadly margined with black at extremity, apex jagged and fringed 

 with rather long, slender, nearly straight, black hairs. Hind tibiae with a 

 long, narrow glabrous streak, more evident near tip, on hind face. Anal 

 angle of wing full ; costa thickened at junction with humeral vein. 



Female. Face with gray dust. First antennal joint a little longer than 

 in male. Hind tibiae not glabrous, the apical infuscation not evident. Anal 

 angle of wing rounded ; costa not thickened. 



Two males and one female from North Park, Colorado, col- 

 lected at an altitude of over 9000 feet during July. 



The shorter antennae, broader face, violet front, more ex- 

 tended margination of hypopygial lamellae, and the closer 

 ciliation with brown hairs of the hind femora which possess 

 two ante-apical bristles, distinguish this species from mela- 

 nocerus Loew. 



Dolichopus apheles, sp. nov. 



Green ; face ochraceous ; antennae black, with a simple arista ; infra- 

 orbital cilia white ; tegular ciha black ; feet plain, yellow, except tips of 

 hind femora and tibiae black ; hind tarsi black ; fore coxae yellow with dark 

 hairs ; fourth longitudinal vein not broken. 



Male. Length 5 mm., of wing 4 mm. Not so brightly colored as in 

 most species, largely green. Proboscis piceous, palpi roseous yellow. Face 



