Feb., 1918 Bulletin of the Brooklyn Entomological Society 19 
NOTES ON CHLOROPIDZ, WITH DESCRIPTIONS 
(DIPTERA) 
By J. R. Mattocu, Urbana, II. 
I described the genus Oscinoides in 1916 to include one species, 
arpidia Malloch.* Since the description appeared I have taken 
four specimens belonging to the genus, all of which differ from 
each other strikingly in color. One example only agrees with the 
type. Structurally they agree so closely that I consider it prob- 
able that they are but color varieties of one species. 
The present seems to be an opportune time to mention a generic 
character which was not given when the original description was 
published. The ocellar bristles are strong and widely, laterally, 
divergent, differing in this respect from those of Gaurax and 
allied genera, which are either parallel or cruciate and generally 
directed backward. 
I give a key to the four forms herewith, naming them as they 
are so distinctively marked. As they agree so closely in structure 
it is not necessary to give full descriptions, the original descrip- 
tion of the type being sufficient for their identification. 
Key To VARIETIES OF Oscinoides arpidia MALLocH. 
1. Thorax, including scutellum, and abdomen glossy black; frons, except 
narrow front margin, and back of head glossy black; female, 
atra var. nov. 
AG JASE Tae Seciallierin SeMOuy GAcoseosnedeodoboddusedea munca Kt 2 
2. Scutellum, anterior lateral angles of mesonotum, and two small round 
areas near posterior margin of disc of latter yellow, remainder of 
tnoress Glossy lollacke femall® .oncconcc0cd00c000000c humeralis var. nov. 
A much larger proportion of disc of mesonotum yellow ............ 3 
3. Palpi yellow; frons except ocellar triangle yellow; thorax yellow, with 
5 abbreviated vitte, the median one broad and extending slightly be- 
yond middle, its anterior portion connected with submedian vitta, the 
latter narrower than median, and broken at suture; lateral vitta a 
short streak above wing base; pleure yellow, with a longitudinal 
blackish streak on lower margin of mesopleura, and the upper portion 
of sternopleura of same color; antennz almost entirely yellow; male, 
elegans var. Nov. 
* BuLL. BRooKLYN ENT. Soc., Vol. 11, p. 86. 
