36 CYRTIDAE OF NORTH AMERICA 



as follows: Mt. Jefferson, July 15, 1907; Mary's Peak, June 6, 

 1915 (Lovett); Rock Creek; Buck Mountain, July 9 to 15. One 

 specimen from Mt. Jefferson has an extra cross-vein in each wing, 

 forming a supernumerary cell just beyond the outer first basal 

 cell. Two specimens from Buck Mountain have the third an- 

 tennal joint very large and bi'oad. In another specimen the vein 

 closing the fourth posterior cell is represented by only a stump in 

 one wing. In two specimens from Mary's Peak the fourth pos- 

 terior cell is not closed. 



In the author's figure of E. tristis the anal cell is shown closed 

 in the margin. In two specimens from Santa Cruz Mountains, 

 California, the anal cell is petiolate. In these same individuals 

 the ocellar tubercle is low and rounded. A specimen in the Na- 

 tional Museum from Alameda County, California (Coquillett), 

 has a short stump in the submarginal cell from the second sub- 

 marginal. The third antennal joint ends very bluntly. All of 

 these specimens and many others examined are darker .in color 

 than smaragdinus or sapphirinus and less metallic. The pro- 

 boscis when at rest just about reaches the tip of the abdomen. 



On June 18, 1917, I collected nine specimens of tiistis near 

 Parkdale, Oregon, in the upper Hood River Valley, at an eleva- 

 tion of about 3,000 feet. Four specimens were collected near the 

 West Fork of the Hood River on lupines. The others were taken 

 on some small white flowers near by. They appeared to be good 

 fliers and were taken in the sunshine. One of the females taken 

 in this lot has the second submarginal cell petiolate in one wing 

 and sessile in the other. I have seen two other females with the 

 second submarginal petiolate, so this character is not always 

 reliable. 



Eulonchus sapphirinus (PL V, fig. 19.) 



Eidonchus sapphirinus O. S., W&stern Dipt., p. 276, (1887). 



"Antennae black, sometimes brownish or reddish toward the tip; epistoma 

 black or bluish black; ocellar triangle dark blue or purple, sometimes with 

 greenish reflections, clothed with dense, erect, grayish yellow pile on the 

 thorax; abdomen with similar but much less dense pile, and with an appressed 

 yellowish white pubescence, visible in certain lights only; feet straw yellow; 

 tarsi ))rownish toward the tip; wings grayish subhyaHnc, costal cells lirownish 

 yellow; costal and first longitudinal veins black on tlieir proximal half, brown- 

 ish yellow toward the tip; tegulae whitish, their margins yellowish, knobs of 

 haltere^s yellow. The proboscis of the male does not reach the end of the 

 abdomen, that of the female does not reach beyond it. Length, 9-11 nun. 



