32 Psyche [April 
gratified last January, when I found it correctly identified in Pro- 
fessor Hine’s collection from Guatemala and British Guiana. 
The specimens agree with Van der Wulp’s description throughout, 
except for one thing:—there is not the slightest trace of the row of 
hypopleural bristles. The genus has so many strong characters 
that misidentification seems impossible; the only other explana- 
tion of the discrepancy is that Van der Wulp saw the bristles on 
some other fly and got it confused with this species, and this 
I think is what happened. 
Since Charadrella has a number of unusual features, and does 
not fit well in any of the subfamilies recognized by Malloch in 
his recent tabulation (Canad. Ent., Dec., 1917, 406), I add the 
following mostly chaetotactic characters taken from one of Pro- 
fessor Hine’s males: 
Head: front one-fourth the head-width at vertex, widening 
forward very gradually; frontals in a single row, about 10, the low- 
est just at the antennal insertion; ocellars broadly diverging, 
slightly proclinate; no cruciate bristles; verticals as usual but not 
strong; vibrissz large, just at the lower edge of head, above them 
a patch of small black hairs extending more than halfway to root of 
antenne and nearly halfway to the eye; infra-orbital cilia (sete) 
pale. 
Thorax: ps de 3 (from the spacing 4 will probably also occur), 
ant de 2, hum 4, posthum 1, prs 1, npl 2, intal 2, supal 3 (of which 
the prealar is less than half as long as the next), postal 2, ant acr 
0, post acr 1 (prsc), stpl 3 (the anterior small, posterior 2 close 
together vertically), mesopleura with 3 at lower front corner and 
a row of 6 behind, sternopleura and mesopleura with upright 
rather long pale hairs which also cover the pteropleura, hypopleura 
bare; scutellum with two long pairs, marginal and apical, and sev- 
eral small submarginal, the disk very hairy; both spiracles very 
large; hind calypter much exceeding front one; scutellum bare 
below. 
Abdomen: first and second segments without bristles above, 
third with 4 marginals, fourth with 6 marginals and a discal pair 
so far apart that they stand almost at the edge; sternites 2—5 with 
a few bristles; 2-4 separated from the tergites by a wide mem- 
brane; genitalia small. 
Wing: third and fourth veins strongly divergent toward tip, 
