1918] Aldrich—Notes on Diptera 33 
the third sinuous, ending a little before apex, fourth very slightly 
turned forward near tip, less than third; no setz on any veins, no 
costal spine; sixth vein does not reach margin, seventh parallel 
with it. 
Legs: tibiz almost without bristles, hind basitarsus not with 
spine below. 
(c) In the Carnegie Museum are three flies which were probably 
captured farther north than any others on record. They were taken 
by J. W. Goodsell, surgeon of the Peary Expedition, and are la- 
beled, ‘82 degrees north latitude, on the beach at the northeastern 
extremity of L. Hazen, in the interior of Grant Land. June 7, 
1908.” This would be about 550 miles from the pole. One of the 
specimens is Fucellia pictipennis Beck., a species described from 
Greenland and taken since in the Arctic by the Canadian Arctic 
Expedition. The other two specimens belong to Phormia terre- 
nove Desv., described from Newfoundland and again from Green- 
land, a circumpolar species which is common in the mountains of 
the western states and occurs rarely in lower altitudes (Indiana, 
New Jersey). 
(d) Two or three years ago Professor Johannsen inquired of me 
if I had any males of Lonchoptera. On going over my material, 
I was surprised to find but two males;—one from Colorado, taken 
by C. F. Baker, the other from the Parry Sound region of Ontario, 
taken by H. A. Parish. My attention being thus directed to the 
rarity of males, I followed up the matter during my sweeping work 
in the summer of 1916, noting in each sweeping the number and sex 
of the Lonchopteras. At the end of the season I had counted 
2,652 specimens, all females, not a single male appearing. Most 
of these were taken in northern Indiana, but many were from other 
parts of the United States, and a few from Ontario. 
In this connection should be mentioned Mr. Lundbeck’s treatise 
on Lonchoptera in his beautiful series called Diptera Danica, v, 
1-18, 1916. He recognizes in Denmark three species,—tristis, 
lutea and furcata. He says nothing about any rarity of males in 
the first two, but in furcata he says he has not seen the male, and 
only about six are known in collections, while the female is common. 
This is a parallel case, if in fact we do not have the same species, as 
I believe we do. 
(e) The common leaf-miner Agromyza pusilla has many host- 
