342 ERNEST A. BACK. 



Chrysoceria pictitarsis (PI. VI, fig. 6.) 



Laparus f pictitarsis Bigot, Annales, 1878, 417. 



Laparsits f pictitarsis Williston, Trans. Am. Ent. Soc., XI, 25, 



1884. 

 Chrysoceria pictitarsis Williston, Jour. N. Y. Ent. Soc, XI, 1, 

 1907. 

 cj 1 9- — Length 10-13 mm. — Black; head, thorax and abdomen almost 

 wholly densely golden pruinose, except two median stripes and two 

 large lateral spots on either side of the thoracic dorsum and the basal 

 portion of the abdominal segments except the first, which are black. 

 Legs yellow; the femero-tibial articulations above, tips of all the tibia? 

 and of the tarsal segments blackish ; wings hyaline, tinged with yel- 

 low. 



Antennas, palpi and proboscis black, and clothed with the same 

 golden pile and hair as found upon the face, front, occiput and thorax; 

 occipito-orbital bristles numerous, short, stout; the hairs on the an- 

 terior portion of the thorax short and bristly; the bristles as in generic 

 description; pleurae with fine, sparse pile upon the meso- and sterno- 

 pleurae, and with longer trichostical hair. The two median black stripes 

 on the thoracic dorsum are will separated by golden bloom, and greatly 

 abbreviated behind; the two large black spots on either side are dis- 

 tinctly separated by golden bloom along the transverse suture. Scutel- 

 lum golden pruinose, with two or three bristles on either side of the 

 posterior margin. Abdomen both above and on venter wholly and 

 densely golden pruinose except the last and sometimes the penultimate 

 segment, which is polished black; also the bases of all the other seg- 

 ments excepting the first, more or less polished black; this polished 

 black is greater in extent upon the second and third segments, but can 

 be noticed on all the others, sometimes only as a line (this depends 

 somewhat on how the abdomen is held) ; on all the segments the black 

 area is narrow on the middle of the tergum, but widens posteriorly on 

 the sides, so that it is in some specimens very prominent. Male gen- 

 italia polished black, with fine golden pile. Legs yellow; the coxae, 

 femero-tibial articulations above, tips of all the tibiae and meta- 

 tarsi, and the greater part of the remaining tarsal segments black; 

 coxae golden pruinose; bristles and hair of legs golden, those on the 

 distal tarsal segments black ; the spines on the tip of the front and 

 middle tibiae black. Wings hyaline, tinged with yellow, a little deeper 

 colored along the costa toward the base; veins brown; venation normal. 



Type. — Bigot collection. 



Habitat. — California (type); Los Angeles Co., Cal. (D. W. 

 Coquillett); near Lander, Wyo. (500 to 8,000 ft. elev., Sept., 

 Roy Moodie). 



