16 



DIPTEEA. 



Two specimens, male and female, agreeing quite with others from the eastern 

 United States. 



2. Syrphus lotus. 



Syrphus lotus, Willist. Synopsis N.-Am. Syrphidse, p. 75 \ 



Hab. United States, Arizona K— Mexico, Omilteme in Guerrero 8000 feet (H. H. 

 Smith). 



Two female specimens, agreeing well with the description. 



3. Syrphus eupeltatus. 



Syrphus eupeltatus, Bigot, Ann. Soc. Ent. Fr. 1884, p. 91 \ 

 Hab. Mexico * Omilteme in Guerrero 8000 feet (H. H. Smith). 



I feel pretty sure of the identification of this species, notwithstanding that the 

 thorax is not " noir," but dark olivaceous-green, and not shining. The face is unusually 

 prominent, the upper oralmargin projectingeven beyond thelarge rectangular tubercle. 

 The author makes no mention of this, the most striking characteristic of the species ; 

 still the identity is not doubtful. Eight specimens. 



4. Syrphus ? \t**»* V 



Hab. Guatemala, San Geronimo (Champion). 



Quite like S. eupeltatus in structure, but with a large black spot in the frontal 

 triangle, a broad black facial stripe, and a darker mesonotum, with less yellow on the 

 margins; the pleuree are shining blue-black (instead of chiefly yellow), the legs are 

 browner, and the size is smaller (about 10 millim.). 



5. Syrphus diversus, sp. n., 6 $ . (Tab. I. figg. 6, $ ; 6 <z, head.) 



Male. Face light amber-yellow, golden-pollinose on the sides, clothed, like the front, with black pile. Frontal 

 triangle large, not shining ; blackish above, below with a small, rounded, shining black spot. Vertical 

 triangle small, black. Antennae smali, red ; third joint blackish above, orbicnlar. Eyes bare. Meso- 

 notum opaque dark olivaceous-green, with light-coloured pile ; a spot at the outer end of the suture and 

 the postalar callosities yellow. Scutellum light yellow, with black pile. Pleura? subshining blue-black, 

 yellowish in the middle, and with yellow pile. Abdomen with nearly parallel sides, opaque black ; rlrst 

 segment small, shining, yellow at the sides ; second segment with two large triangular yellow spots, 

 leaving a moderately broad interval between the points j the three following segments each with a mode- 

 rately broad, gently arcuate yellow band, situated towards the front, not interrupted or emarginate, and 

 attaining the margins in their full or increased width ; pile black. Legs black, the coxaa, the distal 

 portion of the four anterior femora, the hind knees, and the broad base of the four anterior tibi« yellow ; 

 the four anterior tibise for the rest, and their tarsi, blackish or brownish. Wings clouded with brownish', 

 more deeply so on the anterior border distally. 



Female. Pront dark opaque olivaceous-green above, with black pile. Pifth abdominal segment two-thirds as 

 long as the fourth ; the sixth segment with a small yellow spot on the anterior angles. The four anterior 

 legs yellow, with the base of the femora black, or with a black spot, and the tarsi blackish 



Length 11-12 millim. 



