360 



PSYCHE. 



[June iSqo. 



this group have been described from 

 America ; in all of Loew's species the 

 abdomen is metallic green (or in D. 

 opacus black) throughout. Loevv re- 

 cognized the fact that the American 

 diaphori are especially heterogeneous, 

 but with his usual fine judgment de- 

 clined to resolve the genus into several. 

 Such an attempt even at the present 

 time, would be unwise, as I am con- 

 vinced that there are still many North 

 American species awaiting descrip- 

 tion. 



DiAPHORUS PALPIGER, n. Sp. $ 



Length 2.75 mm. ; length of wing 2.5 mm. 



Palpi very prominent, as long as the face, 

 from the insertion of the antennae to the 

 oral margin ; glistening white, golden yellow 

 at their bases, with a few long silvery hairs 

 on their edges. Face broad, covered with 

 yellow dust and presenting a somewhat 

 shallow, V-shaped depression near the oral 

 margin. Antennae black, apical joint more 

 piceous, hairy, twice as broad as long, reni- 

 form with siibapical arista. Front and oc- 

 ciput broad, without any tendency to con- 

 tiguity in the eyes, covered with the same 

 glistening yellowish dust as the face; cilia 

 of the superior orbit short and black, those 

 of the inferior orbit very long and silvery 

 white, forming a conspicuous, though not 

 very dense beard when the head is seen in 

 profile. Thorax and scutellum golden 

 green, their brilliancy much subdued by a 

 thick layer of yellow dust most abundant on 

 the anterior half of the thoracic dorsum and 

 on the lateral corners of the scutellum ; 

 pleurae greenish black, dusted with white, 

 the yellow dust of the thoracic dorsum ex- 

 tending over the humeri on to the anterior 

 pleurae a short distance. Tegulae pale yellow 

 with yellow cilia. Abdomen metallic green, 

 not vivid and less golden than the thorax 



and scutellum ; intersegmental incisures 

 narrowly black as are also the short robust 

 hairs covering the segments; hypopj'gial 

 appendages pale yellow. Coxae concolorous 

 with the pleurae, dusted with white. Femora 

 slightly enlarged, black on their inner 

 and lower faces, which are dusted with 

 white but metallic green on their upper 

 faces; knees rather broadly pale yellow; 

 tibiae and tarsi black, inclining to piceous at 

 thejointo: pulvilli dilated on all the feet. 

 An even row of bristles runs the full length 

 of the under surface of the fore femur, and 

 a long and stout bristle projects from the an- 

 terior face of the median trochanter. Pos- 

 terior legs hirsute ; besides the usual short 

 bristles clothing the tibiae, there is a row of 

 prominent bristles on their anterior and pos- 

 terior faces. Halteres honey yellow. Wings 

 grayish iiyaline. third and fourth longitudinal 

 veins gently converging near the apex of the 

 wing, but becoming parallel just before 

 their termination; anal angle not very 

 prominent; sixth longitudinal vein distinct. 



Habitat : Milwaukee Co. Wis. 



This species is so different from 

 all the species described by Loew, 

 that no difficulty will be experienced in 

 recognizing it. Its dark colored legs 

 and pale tegular cilia place it in the 

 group comprising Loew's D. Iciicos- 

 tonms and D. tnierrupius. The lack 

 of a conspicuous point to the third an- 

 tenna] joint immediately distinguishes it 

 from the former, while the uninter- 

 rupted fourth longitudinal vein as readi- 

 ly distinguishes it from the latter. 



DiAPHORUS RAUTERBERGI, n. Sp. $ . 



Length 3 mm. ; length of wing 2.5 mm. 

 Palpi small, fuscous with paler edges. Face 

 somewhat narrowed below, evenly rounded 

 without any indication of a transverse swell- 



