290 A. L. MELANDER. 



joint largely or wholly reddish yellow, about half as long as the first ; third joint 

 tapering, about twice the length of the first two together; style very minute. 

 Proboscis reddish, about as long as the thorax. Thorax rather thickly gray 

 dusted, the dust modifying the ground color; mesonotuni 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, grayish 

 dusted, color very variable in diflFerent reflections. Legs reddish yellow; front 

 and hind tibiae ou the distal portion, middle tibise at the tip, front metatarsi (ex- 

 cept the immediate base), and the tips of all the other tarsal joints dark brown 

 or black ; front metatarsi elongate and thickened ; all the tibiae with rather 

 dense hairs on the outer side, but not ciliate. Wings uniformly light yellowish 

 brown; discal cell long. Halteres black, with yellow peduncles. 8-9 mm. 



Guerrero, Mexico (Smith). 



Enipis aMAii'emor Wheeler et Melander (Figs. 116, 117). 

 Biol. Cent. Am., Dipt. Suppl., 1901, p. 370. 



This species, which is closely allied to E. annulipes, was estab- 

 lished on a single female specimen from Guerrero, Mexico. It 

 differs from annulipes thus; antennte shorter; the second joint com- 

 paratively long, of nearly the same size as the first joint; the first 

 and second joints of the antennae light yellow, but the first joint a 

 little the darker however ; style more slender. Proboscis piceous. 

 Mesonotuni apparently evittate. Femora black, the anterior ones 

 brownish towards the tip. Front metatarsi shorter and rather 

 thickened. The hairs of the legs are longer and denser, especially 

 on the hind pair. 



Empis nioiitezuma Wheeler et Melander (Fig. 114). 

 Biol. Cent. Am. Dipt. Suppl., Nov., 1901, p. 369. 



Male. — Black, opaque, cinerascent. Eyes contiguous on the vertex. Proboscis 

 one and one-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, cine- 

 rascent, 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 mesonotuni ; 

 abdomen shining in certain lights, velvet-black in others, fuscous on the venter 

 at the base. Halteres black. Hypopygium small, black ; lamella? incrassate, 

 deeply emarginate, 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 tibiae 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. Mcolor the 

 metatarsi are longer). Wings uniformly dark fuliginous*; neuration as in £. 

 bicolor. 6.25 mm. 



Jalisco, Mexico (Schumann). 



