366 NEW YORK STATE MUSEUM 



and terminating acutely with fine serrations on the nearly 

 straight, anterior margin. Labrum quadrate, elongate, obliquely 

 truncate, tipped with an irregular tuft of hairs. Maxillae sub- 

 triangular with slightly curved tip. Maxillary palpus slender, 

 tapering, curved. Mandibles with three prominent and two 

 minor teeth ; posterior margin slightly serrate. The conspicuous 

 mandibular fans consist of about 10 long, curved spines. Eyes, 

 deeply pigmented. Air sacks of thoracic and seventh abdominal 

 segments with many purplish, pigmented cells; the eversible 

 pharynx with a circular, papillate tip or base and a central, 

 straight and two lateral curved papillae. Ventral tuft of ter- 

 minal segment composed of about 22 stout hairs. Ventral plate 

 fulvous, finely serrate anteriorly and armed on its hind margin 

 with a pair of stout, evenly curved, fulvous hooks pointing anteri- 

 orly. Lateral margin of terminal segment bordered with three 

 rows of fine teeth, the anterior row rather stout with a very incon- 

 spicuous line of fine serrations at its base, the teeth of the two 

 posterior rows irregular, long, slender, curved. Dorsal extremity 

 with four finely plumose hairs. 



Sayomyia rotundifolia n. sp. 



PL 13, 40, fig-. 2, 3; 2 respectively 



This species is very close to Sayomyia albipes Johans., 

 but differs in several particulars in both adult and larval stages, 

 as will be seen by reference to descriptions. 



A female was bred July 11 from larvae taken in a woodland 

 pool at Karner and a second Aug. 2. 



Description. Female. Labrum pale yellowish, margined with 

 fuscous. Palpi rather slender, long, four segmented, somewhat 

 fuscous, sparsely clothed with rather long, coarse hairs. Antennae 

 straw yellow, the segments annulated with pale white; first seg- 

 ment globular, second elongated, both semitransparent, straw 

 color. Frontal portion of head whitish, semitransparent ; occiput 

 with a median black spot, the lateral and posterior portions of 

 head sparsely clothed with long, straw yellow hairs. Prothorax 

 with a pair of broad, submedian, fulvous lines anteriorly and a 

 similar pair of broader, sublateral ones posteriorly, inner margin 

 of both stripes bordered by dark brown and outlined with a row 

 of rather short, yellowish brown hairs, the area between the sub- 

 median and sublateral lines clothed with a rather broad row of 

 coarse, brownish and yellowish hairs ; the latter stripe is bordered 

 laterally by a few coarse bristles, and the margin marked by 

 several irregular, black specks. Sc^tellum light brown, crowned 



