AQUATIC INSECTS IN NEW YORK STATE 3 309 
specimens has two longitudinal rows of small spots which are 
not covered by the yellow tomentum. This was particularly 
noticeable in the fresh specimen, but, as drying caused shrink- 
age of the abdomen, the spots are no longer so distinct. 
The fore tibiae are each provided with a single spur, the mid- 
dle and hind ones each with a pair. The tarsal claws are each 
provided with a large basal tooth or lobe [pl.38, fig.15]. The 
halteres are pale yellow. | | | 
Cambridge Mass. and Los Angeles Cal. (Coquillett, 1898); Law- 
rence Kan. and Battle Creek Mich. (Collected by Professor A1- 
awici)s Ithaca N. Y. 
S. clnereum Bellardi 
Saggio di ditterologia Messiana. 1859. 1:13. 
Male and female. Gray, antennae black, first joint pale. 
Thorax fuscous and gray pollinose, the humeri pale; pleura 
light gray; scutellum pale at the tip; halteres white. Abdomen 
blackish. The front coxae pale, the middle and hind pair gray- 
ish brown; the femora pale at the base, their tips black; tibiae 
black, their middle section pale; front tarsi wholly black, the 
middle and hind pair with the bases of first and second joints 
pale. Wings hyaline. Length of body 3mm; with extended 
wings 9mm. 
Mexico, California (Townsend, 1893). 
S. decorum Walker 
List of Diptera. Brit. Mus. 1848. p.112 
Cinerewm, argenteo micans, antennis piceis, pedibus fulvis, femori- 
bus tibiisque piceo fasciatis, tibiis posticis tarsisque posterioribus 
basi albis, alis limpidis. Body gray, adorned with white milky 
luster, specially on the sides of the chest and on the breast; 
feelers piceous; legs tawny; thighs and shanks with irregular 
piceous bands; feet piceous; fore thighs adorned with white 
luster; hind shanks and four hinder feet white at the base; 
wings colorless; fore border veins pale tawny; the other veins 
still paler and very indistinct; poisers pale yellow. Length of 
the body 2.5mm; of the wings 6.5mm. 
St Martin’s falls, Albany river, Hudson bay. Presented by 
Mr G. Barnston. 
According to Mr Coquillett,|§ decorum is a synonym of 8. 
Vittatum Zett. 
1U. S. Dep’t Agric, Bul. 10, n. s. 1898. 
