Vol. XI] COLE AND LOVETT—LIST OF OREGON DIPT ERA 939 



227. Eulonchus tristis Loew 



Several specimens taken at Parkdale, VI- 18 (Cole and 

 Childs) ; Alsea, Benton Co., VIII-6 (Bridwell) ; Lava Lake, 

 VII-25 (Lovett); Mt. Jefferson, V-12 (Bridwell). 



228. Acrocera melanderi Cole 



Corvallis, VIII-18 (F. H. Lathrop). 1919, Trans. Amer. 

 Ent. Soc., XLV, p. 55. The type was taken in Gallatin Co., 

 Mont., elev. 6,400 feet, 1918. 



229. Oncodes melampus Loew 

 Shedd, V-30; Hood River, VI-8 (Childs). 



Family NEMESTRINID^ 



Fig. 17. Rhynchocephalus sackeni Will. 



These are sometimes known as the Tangle-vein flies, be- 

 cause of the complex wing venation. The antennae are small 

 and the proboscis rather elongate; the female has a long 

 ovipositor. The adults are flower frequenting and quite rare. 



The early stages are not well known. The larvae of one 

 species are parasitic on a beetle. 



230. Rhynchocephalus sackeni Will. 



Forest Grove, VII-31 (Reeher) and VIII-12 (Lane); 

 Mary's Peak; Corvallis, VII-19; Lewisburg, VII-5 (Black) ; 

 Union Co., VII-18 (Black). 



