They possibly represent an undescribed 
Calycomyza sp. but may be caused by C. 
artemisiae or C. f lav ino turn , as the ~~ 
mines of one or the other of these 
species were at the same locality on 
Ageratina altissima . 
Hydrophyllaceae 
10. Hydro phy Hum virginianum 
A single empty mine from Wisconsin, 
Madison, 27.V.75 (S. Tavormina) 
appears to represent an undescribed 
species. The mine (fig. 1369) is 
linear in the first instar, with 
scattered black frass, later 
developing into an irregular blotch, 
with distinct feeding lines. The 
species concerned is probably a 
Phytomyza . 
Malvaceae 
11. Sidalcea spicata 
Empty leaf mines were found on this 
host in California, Nevada Co. , 
Sagehen Creek, 6,200 ft, 5. IX. 88 
(KAS). The mine (fig. 1370) is 
irregularly linear, with frass in 
conspicuous black strips. Nine mines 
were in a single leaf. The generic 
reference of this species is uncertain. 
Rosaceae 
12. Rubus s trigosus 
White upper surface linear mines (fig. 
1371) were found in Minnesota, 
Minneapolis, Minnehaha Creek, 20. VI. 80 
(KAS). Similar mines were common in 
the Ottawa area, Ontario, in July 1967 
(Spencer, 1969a: 62). No adults were 
obtained from either locality, and the 
identity of the species remains 
unknown, but it will certainly prove 
to be an Agromyza sp. close to A. po - 
tent illae (p. 70). 
Salicaceae 
13. Salix lasiandra caudata 
Empty mines were found in California, 
Sagehen Creek, 6. IX. 78 (KAS). The 
mine (fig. 1372) is a blotch filling 
the apex of the leaf, with frass in 
scattered black grains. The puparium 
is brown, with the posterior spiracles 
on short projections, each with three 
bulbs. Pupation takes place 
externally. Examination of a dead 
larva showed the species to be an 
Agromyza . 
HOST LIST 
The larval feeding habit is indicated 
as follows: CB, cambium borer; F, seed 
feeder (flower heads); G, gall causer; 
L, leaf miner; SB, stem borer; SM, 
stem miner. 
Brackets [ ] around the host name 
indicate that the host is not recorded 
in the United States but is known 
elsewhere . 
Plant names have been revised, .5/ 
except those followed by "ex" in 
author citations have been omitted 
according to the practice authorized 
by the Botanical Code. 
i^Based on Terrell, E. E. , A Check- 
list of Names for 3,000 Vascular Plants 
of Economic Importance, U.S. Dept. 
Agr., Agr. Handbk. 505, 1977, and U.S. 
Dept. Agr., Soil Conserv. Serv., 
National List of Scientific Plant 
Names, 2 v. , SCS-TP-159, 1982. 
224 
