AQUATIC INSECTS IX NEW YORK STATE 377 



t>la('k; in front, opaque with a silvery shimmer, and with sparse, 

 short, curly, golden yellow tomentum; behind, shining. Pleura 

 blaek, whitish ])ruinose. Abdomen black, the basal segments 

 opaque, the distal four segments somewhat shining, and with a 

 delicate whitish pruinosity. Legs reddish yellow; tarsi black, 

 except that the ])roximal half of the middle and hind metatarsi 

 is light yellow; first and third joints of the front pair each with 

 two long hairs; second and third joints of the same ])air dilated, 

 the fourth and fifth very small; hind metatarsi elongate and 

 stout, the following two joints a little dilated, the fourth and 

 fifth small. Wings hyaline; veins yellow. Williston 



Three specimens. The above synonymy is according to Hun- 

 ter. 



This species seems to resemble greatly S. venustum ex- 

 •cepting for the color of its legs. 



S. quadrivittatum Loew 

 Berl. Ent. /I'itschr. 18()2. Centur. 2. p.186 



Black opaque, the thorax with four wliite vittae; the halteres 

 yellow; middle and hind tibiae and tarsi white banded; wings 

 hyaline. Body 1.67mm; wing 1.67min. 



Black, opaque. Antennae fuscous; dorsum of the thorax with 

 four longitudinal lines, the posterior margin whitish pollinose; 

 scutellum spotless; the pleural spots and the metanotum 

 whitish pollinose; the legs fuscous black; the knees and the 

 bases. of the metatarsi of the fore legs, the basal rings of the 

 middle and hind tibiae, the metatarsi excepting the tip, and the 

 hases of the second and third tarsal joints are white; halteres 

 jellow; wings hyaline, the heavier veins deep yellow. Cuba. 



S. reptans Linnaeus 



FauDa Siiec. 180.3. 17G1 (Syuonyniy accoMiug to Schiuer, 2) 



17(i7 sericea Linnatnis. Syst. Nat. 12:978. no. 58 



1776 e r y t h r c e p li a 1 a 1 >f'( Jci r. Ins. (1:101. no. 37 (Tipnla) 



1781 reptans L. Schrank. Ennin. Ins. Austr. p.985i (Culex) * 



1804 a r g y r o p e z a Meigen, Syst. Bcselir. 1 :291-92 



1818 reptans Meigen, Syst. Beschr. 1:291-92 



181S sericea Meigeu, Syst. Besclir. l:29{)-98 



1818 e 1 e g a n s Meigen, Syst. Beschr. 1:296-99 



1818 V a r i e g a t a Meigen, Syst. Besclir. 1:292-93 



1828 reptans Fries. Obs. Entomol. Tars 1 Monogr. Sinuil. 1:13 



18:'.() i n c t a Meigen, Sy.st. Beschr. 6:311-14 



1838 posticata iMeigen. Syst. Besclir. 7:52, 21 



Male. Velvet-black; dorsum of \he tlioi-ax wiili a silvery white 

 margin, spotlike on the humerus, broadly iuterru])ted fn front; 



