376 NEW YORK STATE MUSEUM ue 
the pupa, in stating that there were but eight; for, on examina- 
tion of the Cambridge material, nine filaments were counted. 
Coquillett (1898) says of the male mesonotum, “usually with © 
three black vittae”; but this I have found to be an exception 
rather than a rule. 
Recorded from New York, Texas, California, and Moscow Id. 
(Collected by Aldrich). 
Larva. Length10to12mm. Plate 36. 
The fans of this species have about 60 rays; the cilia and 
the regularly arranged setae on the inside of the rays are very 
distinct. The antennae, light brown in color, are three jointed, 
the second joint about one third as long as the first, the third 
very short and pointed, the extremities of the first and second 
are hyaline, the two small budlike processes at the end of the 
first and the second joint are brown. The mandibles possess 
the apical pair of bristles, the apical teeth are quite black, the 
others paler; the maxillary palpus with a few scattered bristles 
on the shaft and at the base. Labrum and hypopharynx as 
usual, in the latter the lateral hornlike processes are quite 
prominent. Labium with the toothed area rather narrow, the 
lateral and middle teeth elongate, the ventral surface with two 
rows of 10 or 11 bristles each [fig.38]. The thorax and abdomen 
are a deep black; paler at the incisures, and on the ventral sur- 
face, particularly toward the caudal end. A narrow black 
longitudinal, ventral stripe is often present. The blood gills 
consist of three many branched papillae. 
Pupa. The two thoracic respiratory organs each consist of 
nine filaments; eight of which are about equal in length, the 
ninth arises a little lower on the shaft, and is somewhat shorter 
[fig.8]. On the dorsal surface of each of the segments 2, 3, 4, 
and 8, are eight black hooks curved cephalad, those on the 
second and the eighth segments being much smaller than the 
others. Ventrally 5, 6 and 7 each, with four double, curved 
hooks, on the caudal segments are two very short blunt spines, 
and three smaller ones on each side of 3, 4 and 5. The pupal 
case is of the boot-shaped type [pl.35, fig.5]. 
S. pulchrum Philippi 
Chilian Diptera. 1865. p.633 
1896 S. tarsale Williston, Dipt. of St Vincent, p.268 
Female. Abdomen black, the proximal segments opaque, the 
distal four segments shining. Length 2mm. 
Front and face black, with a light gray reflection. Antennae 
yellow; the distal joints somewhat brownish. Mesonotum deep 
