M. C. VAX DUZEE 81 



Xiphandrium xlpheres Wheeler 



!'(,)■ Iihjiroj.s xi iilii n.s Whvch'v, Proc. ("al. Acad. Sci., ii, |). '.',A, pi. ii, fij;;. 53. 



The followiiif^ is a copy ol Prof. Wheeler's de.si'ript.ioii; I have 

 not seen any specinien of this fonu. 



cf : Length, 3.5 mm.; of wmg, 3 mm. Palpi small, du.stcd with white. 



Face broad for a male, covered with silvery white; dust. Antennae black; 

 first and second joints short, third joint flattened, as long as the thorax, slowly 

 tapering to the tip and covered with sliort and almost imjierceptible pile; 

 arista terminal, very short pubescent, its basal segment somewhat thickened. 

 Front black, rather ojiaquc. Postocular cilia abundant, snow white. Thorax 

 and scutellum blackish metallic green, the latter with bluish reflections. Ab- 

 domen dark metallic cupreous green; edges of the segments black; basal seg- 

 ments bearing long pale hairs on their sides. Hypoi)yginm shining black, 

 with the i)r()truding app(>ndages; lamellae triangular, taj)ering, covered with 

 erect hairs, black, each with a small wliite spot at its base; internal appendages 

 club-shajx'd. Pleura thickly (covered with gray dust, except above the base 

 of the middle coxae where the metallit; gnM'n ground-color is exposed. Coxae 

 concolorous with the pleiu'a, only their extreme tips yellow; anterior surfaces 

 of fore coxae clothed with conspicuous silvery white hairs. Middle coxae 

 each with a tuft of similar hairs and a couple of stout curved, black bristles. 

 Legs plain, yellow, anterior tarsi from the tij) of the first joint, the hind tibiae, 

 which are somewhat incrassated, hind tarsi and the hind femora on their 

 ui)per sm-faces near the tip, black. Wings grayish hyaline, not narrowed 

 towards their base; veins brown; third and fourth veins nearly parallel. Hal- 

 teres and tegulae yellow, the latter with long white cilia. 



Dehaware County, Pennsylvania. 

 Xiphandrium femoratum new species (Text-figs. 1 and 4.) 



cf: Length, 2.8 to 3 nnn. Face narrow, of nearly parallel width, silv(>ry 

 white. Palpi black, their tips with white pollen like the iace. Front violet. 

 All! eiinae black; third joint fully as long as the height of the head, rather 

 bi-oad at base, gradully tapering; arista as long as the width of the front at 

 vertex. Upper orbital cilia black, the white beard long and abundant. 



Thorax and scutellum dark shining green with just the suggestion of a 

 broad median vitta of blackish or violet; pleura with thin grayish white pollen. 



Abdomen metallic green, more blue on the sides, sometimes almost wholly 

 coppery, wuth conspicuous white hairs on the sides and venter. Ilj'popygium 

 (fig. 1) black with stiff black hairs; the outer lamellae (fig. 4) lanceolate, black, 

 more or less yellow at base, fringed with rather long pale hairs, some of which 

 appear nearly black; inner appendages small, black, somewhat shovel-shaped, 

 rather obliciuely truncate at tip, with a pale stout bristle at the acute apical 

 (H)rner and a few stiff hairs back of this spine. 



Fore coxae black with about apical half j'ellow, their anterior surfa('e cover- 

 ed with long white hairs; middle and hind coxae black with narrow yellow 

 tips, the former with two long black bristles on outer surface and with a few 



TRAXS. AM. ENT. SOC, XLVIII. 



