THE CANADIAN ENTOMOLOGIST. 327 



NOTES ON TENTHREDINOIDEA, WITH DESCRIPTIONS OF 



NEW SPECIES. 



BY S. A. ROHWER, BOULDER, COLO. 



Paper VI. — Western Macrophy/e. 

 Through the kindness of Prof. C. F. Baker I have had the oppor- 

 tunity to study a number of species of Macrophya which were collected in 

 California. All these are short (6 to 8 mm.), robust, and largely black. 

 The clypeus in all of them is black, or the apex is pale, and in most of the 

 specimens the clypeus is truncate. The antennae are short, stout, the third 

 joint is longer than the fourth, and the apical joint in some cases is very 

 small. The venation is normal, the lanceolate cell has a short straight 

 cross-neivure. The scutellum is black or marked with yellow. In the 

 following table I have incorporated a few species from the West, which I 

 have not seen ; some of these may not belong to this group, but from the 

 descriptions it is impossible to tell. Until these species have been studied 

 it is not desirable to go into details about the limits of this group. The 

 species which are placed from descriptions are marked with a star : 



Females i • 



Males 9- 



i. Most of the dorsal abdominal segments with the apical margin pale. 2. 



All of the dorsal abdominal segments black (the apical segment is 



sometimes pale) 6. 



2. Posterior cox* entirely black ; (venter black) . . .pluricinctella, Roh. 

 The tips of the posterior coxse always pale 3  



3. Clypeus distinctly notched ; (venter black) melatiostoma, Roh. 



Clypeus truncate or but slightly incurved 4- 



4. Venter black; (length, 7 mm.; spot on the scutellum and the upper 



side of the posterior legs white) pluricincta, Nort.* 



Venter largely white 5- 



5. Posterior femora on the inside only black : no shining area behind 



the lateral ocellus ; anterior margin of the clypeus pale ; abdomen 



dorsally with distinct scattered punctures Doanei, Roh. 



Posterior femora black on the inside and outside, pale above and 

 beneath ; a shining area to the side and behind each lateral ocellus; 

 clypeus black ; abdomen dorsally without distinct scattered punc- 

 tures multicincta, Roh. 



September, 1909 



