SOUTH AMERICAN DIPTERA. 247 



pubescent. Face strongly piojectins downwards ; black, witb a dirty wbite 

 stripe in the middle, and a semi-oval, light yellow spot on each side below the 

 antennae; pile chiefly black. Eyes pilose. Mesonotum black, moderately shin- 

 ing, not distinctly vittate, on the posterior part broadly, but not conspicuously, 

 yellow pubescent or tomentose. Abdomen strongly coarctate at base; black, 

 with a purplish or bluish reflection, black pubescent; second segment more 

 brownish, on its anterior, most coarctate, portion, two moderately large, oval, 

 white translucent spots, on the venter the segment wholly so. Legs deep black . 

 all the tarsi white, with the last two joints infuscated or blackish. Wings dark ] 

 along the anterior part with a reddish cast, broadly blackish at the end and 

 behind, except that the anal cell chiefly, and a large part of the anal angle, are 

 hyaline. 



My two specimens seem to be male and female ; in the one the 

 base is less long petiolate than, but the apex rounded and with an 

 appendage as, in H. eoardata Macq., as figured in his Dipt. Exot. 

 Suppl. i, pi. V, fig. 4 ; in the other the tip is broader and the genitalia 

 are concealed. From H. eoardata there are abundant diflferences. 

 The eyes have the same pattern of markings as in the two preceding 

 species and consisting of a purple stripe of quadrilateral figure, par- 

 allel to the inner, and outer upper, margins, with the other two sides 

 deeply concave inwardly. This represents a fourth type of colora- 

 ti(m in the genus, the other three of which have been described by 

 Osten Sacken. As a warning against the attempt to base any divi- 

 sional generic characters on the eye pilosity in Hermetia, I will men- 

 tion that H. lativentris Bell, (or at least a closely allied species, see 

 Can. Entom. xvii, 125) has the eye markings quite as Osten Sacken 

 describes them in his closely allied H. relida, though the eyes are not 

 bare, but distinctly pilose. 



8. Chrysochlora spp. 



The South American species of Chrysochlora, or rather the species 

 so named by authors, for the type, C. amethystina, from the Isle of 

 France is hardly congeneric, are very diflBcult to discriminate and 

 describe. They resemble each other very much and the coloration 

 is variable ; the descriptions hitherto published, based almost exclu- 

 sively upon coloring, are, almost without exception, worthless. I 

 have twelve specimens from Chapada and Rio de Janeiro, and scarcely 

 any tw^o are alike. The diflferences that I discover I endeavor to 

 show in the following: table : 



