142 THE CANADIAN ENTOMOLOGIST. 



Male. Female. 



Pdastoneurus lamellatus, Loew 15 18 



Farac/iiis hybridiis 9 5 



Paradius propinqiius, Wheeler 21 13 



The intermediate character of the new species seems to indicate 

 a case of hybridism, but the data are not sufficient to bear out this sup- 

 position. Hyhridus shows affinity for Pelastoneuriis in the trend of the 

 fourth longitudinal vein and in the lack of the filamentous appendages of 

 the hypopygial lamella?. The other characters are, however, Paraclian. 

 It may be readily recognized by the following combination of characters : 

 Antennae largely red ; base of fore coxae narrowly dark ; front bronzed ; 

 lamella? of hypopygium triangular. 

 8. Nematoprodus vejiiistus, n. sp. (Fig. 12.) 



Male. — Length 4.75 mm., wing 4.5 mm. Face narrow, of nearly 

 equal width, reaching three-fourths of the distance from the antennae to 

 the lower corner of the eye, covered with silvery dust. Palpi small, 

 yellow, inserted at sides of proboscis. Proboscis piceous, sparsely 

 pubescent. Antennge short, reddisli ; first joint longest, glabrous ; third 

 ovate, short, vvith dorsal, long, bare arista (pubesence scarcely perceptible 

 under higher power). Front shining green, the white of the face 

 encroaching along the sides above the antenna?. Post-ocular cilia yellow ; 

 lower occiput with long yellow hairs. Eyes hairy. Thoracic dorsum and 

 scutellum brilliant green, slightly dusted anteriorly, and with faint 

 indications of median cupreous stripings ; above the base of the wing a 

 velvety black spot present, stronger anteriorly. Abdomen hairy, 

 incisures blackened ; first segment brassy green, second and third 

 translucent yellow, fourth cupreous becoming green, sixth green ; 

 hypopygium small, rounded, piceous, pubescent, terminal, with long, 

 filiform, infuscated, hairy appendages; internal appendages inconspicuous ; 

 penis short, perpendicular. Pleura greenish, gray-dusted. Middle and 

 posterior coxje concolorous with pleura ; anterior coxa? yellow. Legs 

 yellovv, except i)osterior tarsi and outer fourth of posterior tibiae, which 

 are infuscated ; pulvilli not conspicuous Wings clear, broadest about 

 the middle; last segment of fifth vein once and one-half the length of 

 the cross-vein ; cross-vein oblique ; last section of fourth vein converging 

 towards third, then subparallel towards tip, distant from third vein, and 

 terminating at tip of wing. Halteres and teguhe yellovv ; tegular cilia 

 long, pale yellow. 



