22 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



second abscissae of the radius will separate the males. The radial 

 cell is rather large, extending nearly to apex of wing; the lower ab- 

 scissa of basella is usually shorter than nervellus and but little more 

 than half the length of upper abscissa of basella; the female antennae 

 are shortened, but little longer than head and thorax united; male 

 antennae extend about to the apex of the abdomen, with 29 to 32 

 segments; thorax always mostly black; abdomen black, except the 

 connate second and third segments, which are more or less ferru- 

 ginous. 



Distribution.— lliinois, Canada, Michigan, New Mexico, Maryland, 

 Virginia, District of Columbia, New York, Colorado, Oregon. Doubt- 

 less the species is generally distributed over the United States and 

 Canada. 



Hosts. — Orchesia castanea Melsheimer (Ashmead) ; Platydema 

 ellipticum Fabricius; ''scarabaeid larva"; Tinea oregonella Busck. 



A study of the types of humilis, orchesiae, and agilis has convinced 

 me that they are the same species; and the original description of 

 rohustus, together with Mr. Gahan's detailed notes, made on an ex- 

 amination of the type, has led me to place this name also in the 

 synon3niiy of humilis. In addition to the types of humilis, orchesiae, 

 and agilis, I have seen the following material: One specimen, appar- 

 ently from Quebec, Canada, which Mr. Gahan compared with the type 

 of rohustus; one reared from fungus infested with Orchesia, species 

 and Homosetia, species by Mr. H. S. Barber, near Plummer Island, 

 Maryland; two specimens reared from Tinea oregonella at Parkers 

 Station, Oregon, by P. D. Sergent, Nov. 17, 1914; one bred from a 

 scarabaeid larva by Dr. T. E. Snyder at Falls Church, Virginia; one 

 reared from Platydema ellipticum at Washington, District of Columbia; 

 and collected specimens from Cusack Ranch and West Cliff, Colorado; 

 Oswego and Spencer Lake, New York; Ottawa and Vai Morin, 

 Canada; and Hood River, Oregon. 



14. METEORUS ALA9KENSIS (Ashmead). 



Dyscoletes alaskensls Ashmead, Proc. Wash. Acad. Sci., vol. 4, 1902, p. 24T. 



Type. — In the United vStates National Museum. 



This species is exceedingly like provancheri, as noted in the discus- 

 sion of that species; but for the present it must be held distinct. It 

 is readily separated from tibialis, to which it is also very similar, by 

 the characters given in the key. 



Popof Island, Alaska. 



Host. — Unknown. 



Thai this species is a Meteorus was brought to my attention by 

 Mr. S. A. Rohwer, after my departure from the Museum. He has 

 kindly supplied the characters for distinguishing it from tibialis. 



