278 ENTOMOLOGICAL NEWS [NOV., '22 



depressed caudad ; with a raised flattened-crescent-shaped ridge near 

 their cephalic margin. Mcso and metathoracic spiracles, similar to and 

 unmodified except in the same manner as the abdominal ones. Sutures, 

 all deeply impressed. Length of pupa 15-17 mm. Breadth 5-5.5 mm. 



The characters used in this description are the same as those 

 used by Miss Edna Mosher in Bull. 111. Nat. Hist. Surv. XII, 

 108-112, 1916, and would place the insect in her version of 

 the Hacleninae. 



Cocoon. Several spun beside, above and below each other, in crotches 

 of branches. The cocoon is made out of thin, coarse silk with fragments 

 of leaves and bits of rubbish of various sorts covering the outside. The 

 whole appears to have been cemented together by a fluid which hardens 

 into a stiff glassy substance. Shape oval, about 20 mm. long and half 

 as broad through the middfe. 



Temnostoma bombylans Linne Doubtfully American (Syrphidae, 



Diptera) 



For some time I have had grave doubts as to the authenticity of the 

 records of Temnostoma bombylans Linne from this country and have 

 taken the trouble to get a specimen of the species from Europe, kindly 

 supplied me by Dr. M. Bezzi, for comparison with our specimens. I find 

 that there are differences between the specimens in our collections that 

 do duty for that species and the European specimen. In fact I consider 

 that there are two valid species, both described, from America, neither 

 of which is bombylans. I have seen the type of trifasciata Robertson, 

 sent to me by the describer, and have received data from Mr. Nathan 

 Banks on the type of obscura Loew. I append a diagnosis for dis- 

 tinguishing the forms involved. 



1. Third and fourth tergites in male slightly bluish, and with short decum- 

 bent black setulose hairs beyond the pale fasciae, fifth tergite in fe- 

 male similar to fourth; narrowest part of frons distinctly wider than 

 anterior ocellus ; base of male hypopygium with black hairs ; tarsi of 

 mid and hind legs in male entirely yellow trifasciata Robertson. 



- Third and fourth tergites in both sexes with yellowish or brownish 

 hairs beyond the pale fasciae, which are rather fine ; narrowest part 

 of frons not wider than anterior ocellus 2 



2. Hairs on fourth tergite and base of hypopygium pale yellow, and 

 rather long and soft ; tarsi of mid and hind legs entirely yellow, 



ol'scnra Loew. 



- 1 lairs on fourth tergite and base of hypopygium brown, shorter and 

 stronger ; apical two tarsal segments on mid and hind legs black, 



l>i>i!>\'litiis Linne. 



The male hypopygia appear to offer very good characters for the 

 separation of the three species. J. R. MALLOCH, Bureau of Biological 

 Survey, Washington, L). C. 



