THE CANADIAN ENTOMOLOGIST. 107 



margin of the clypeus, palpi, and all the .legs dull brownish-yellow ; the 

 tarsi somewhat infuscated. Wings smoky hyaline ; nervures and stigma 

 dark brown. 



Habitat : Graymont, Colorado, July, 1892 (C. P. Gillete). Type in 

 the collection of the Colorado Agricultural College. 



This species was given the manuscript name of mellipes by W. H. 

 Harrington, at whose request I describe it. It is closely related to T. 

 erythromera, Prov., but separated by the characters given below. The 

 waxen brownish-yellow of the legs should help to distinguish this species 

 from its allies. The following table will aid in the separation of most of 

 the species with black abdomens ; most of the following have the legs 

 largely ferruginous : 



Tegulae and collar black 1. 



Tegulae and collar pale 4. 



1. Legs dull brownish-yellow, the coxae of the same colour; no pale spot 



above the posterior coxae mellipes, Roh. 



Legs rufous (the anterior tibiae and tarsi in a few cases are 



yellowish) 2 . 



2. Coxae rufous ; a pale spot above posterior coxae riifipes, Say. 



Coxae black 3. 



3. A pale spot above the posterior coxae nigrisoma, Harrg. 



No pale spot above the posterior coxae erythromera, Prov. 



4. Pectus pale 5. 



Pectus black 6. 



5. Legs with a black line above zetes, Kby. 



Legs without a black line above rufopectiis, Nort. 



6. Tibiae entirely rufous 7. 



Tibiae, or at least some of them, with a black line 8. 



7. Coxae black ruficollis, Harrg. 



Coxae rufous rufipes, Say, var. 



8. Posterior tibiae with a black line above Savagei, MacG. 



Posterior tibiae entirely rufous nigrifascia, MacG. 



Tent hr edo f err ugineipes, var. Pikei, n. var. 



Female: Length, 11 mm. Similar to ferrugine\pes, Cress., but differs 

 as follows : The yellow on the cheeks replaced by rufous, teguke testace- 

 ous, not yellow ; posterior femora ; a black spot on the middle femora at 



