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DIPTEBA. 369 



8. Empis montezuma, sp. n. 



c? . Black, opaque, cinerascent. Eyes contiguous on the vertex. Proboscis one and a half times the length 

 of the head. Antennae dark fuscous, first joint short, with a few bristles near the apex (third joint 

 wanting). Thorax black, cinerascent, with indications of a median and two side-stripes showing black 

 through the coating, sparsely hairy on the disc, densely and strongly so on the humeri and about the 

 scutellum. Pleurae and pectus concolorous with the mesonotum. Abdomen velvety-black, fuscous on the 

 venter at the base. Halteres black. Hypopygium small, black ; lamellae incrassate, deeply emarginate 

 above, with loose dark hairs and small apical teeth ; median style densely finely plumose ; penis exposed, 

 reddish. Legs black, the femora and the base of the tibia? with a reddish tinge ; furnished with spines, 

 hairs, and pile ; the pile long, and denser on the middle femora beneath near the base, the middle tibiae 

 beneath near the tip, the posterior tibiae on the outer edge, the first and second tarsal joints, and the 

 hind metatarsi outwardly ; middle femora and tibiae arched ; front metatarsi equal in length to the next 

 two joints (in E. bieolor the metatarsi are longer). Wings uniformly dark fuliginous ; neuration as in 

 E. bieolor. 



Length 6-25 millim., of the wing 5 millim. 



Ilab. Mexico, Santiago in Jalisco (Schumann). 

 A single male specimen. 



9. Empis azteca, sp. n. 



2 ■ Black. Head thickly greyish- pollinose, the ocellar spot in some reflections showing black. Face shining 

 black below, grey-pollinose beneath the antenna?. Antennae black, longer than the head ; third joint 

 gently tapering, as long as the first ; style minute. Proboscis and labella reddish-yellow, black at the 

 base, altogether about as long as the thorax. Thorax opaque grey, variable in colour in different reflec- 

 tions ; pile erect, black ; margin of the scutellum with a row of long hairs. Legs yellow, with black 

 hairs ; femora, except the tip, black ; last joint of all the tarsi brown or black. Wings uniformly 

 yellowish-brown ; anterior branch of the third vein very short, rectangular ; fourth vein arched back, 

 distant from the third at the tip ;. penultimate section of the fifth vein unusually short, not twice the 

 length of the anterior cross-vein ; discal cell small. Halteres black, with yellow peduncles. Abdomen 

 thickly grey-pollinose, the second and third segments wholly shining black. Front metatarsi dilated, 

 and darker than the second to the fourth tarsal joints. 



Length 6 millim. 



Hab. Mexico, Amula in Guerrero 6000 feet (//. II. Smith). 



One specimen. The small discal cell and shining segments of the abdomen will 

 render this species recognizable. 



10. Empis animlipes, sp. n. 



$ . Black. Front and face dusted with white. Antennae black ; the second joint largely or wholly reddish- 

 yellow, about half as long as the first; third joint tapering, about twice the length of the first two joints 

 together ; style very diminutive. Proboscis reddish, about as long as the thorax. Thorax rather thickly 

 grey-dusted, the dust modifying the ground-colour ; mesonotum with four slender darker stripes ; pile 

 and bristles black, the former abundant, erect ; humeral and post-alar callosities reddish. Scutellum 

 with six bristles. Abdomen black, greyish-dusted, colour very variable in different reflections. Legs 

 reddish-yellow ; front and hind tibiae on the distal portion, middle tibiae at the tip, front metatarsi 

 (except the immediate base), and the tips of all the other tarsal joints dark brown or black ; front 

 metatarsi elongate and thickened ; all the tibia? with rather dense hairs on the outer side, but not ciliate. 

 Wings uniformly light yellowish-brown ; discal cell long. Halteres black, with yellow peduncles. 



Length 8-9 millim. 



Hab. Mexico, Amula in Guerrero 6000 feet (II. II. Smith). 



Six specimens. 

 biol. centr.-amer., Dipt., December 1901. o b 



