Vol. xxiii] ENTOMOLOGICAL NEWS 463 
New North American Diptera. 
By W. R. Watton, Bureau of Entomology, 
Washington, D. C.* 
Agromyza davisii n. sp. (AGROMYZIDAE). 
Length 2 mm. Front, cheeks and proboscis yellow. Antennae, 
palpi, occiput and ocellar triangle black. Thoracic dorsum, scutellum 
and pleurae opaque blackish, strongly bristled. A line over the meso- 
pleura pale yellow. Abdomen black, somewhat shining, sutures pale 
greenish yellow. Genitalia shining black. Legs and feet entirely 
black. Squamae, halteres and bases of wings yellow. 
This species belongs to Meigen’s group “C” (c) in which 
the cross veins are approximated and confined to the basal 
fourth of the wing, front yellow. 
Described from two specimens, male and female, reared 
from the leaves of. Ranunculus abortivus, in which it mines, 
by J. J. Davis, Lafayette, Indiana, and in honor of whom it is 
named. 
Type deposited in U. S. Nat. Museum, Washington, D. C. 
Microdon craigheadii sp. nov. (SyYRPHIDAE) 
Microdon laetus Walton (not Loew), Ent. News, XXII, p. 319, I9It. 
In Vol. xxii, p. 319, of ENromotocicaL News the author 
published a note on Microdon laetus Loew. Additional mate- 
rial has since been received and in going over this, in com- 
parison with a specimen in the U. S. National Museum which 
is labelled “M. laevis Loew,’ the two forms are evidently 
abundantly distinct. Now as there is no such species as “M. 
laevis Loew,” and as the specimen referred to above agrees 
closely with Loew’s description of /aetus and is furthermore 
from Cuba, the type locality of Jaetus, it becomes obvious 
that the Pennsylvania specimens constitute a new species to 
which the name Microdon craigheadii is herewith given. To 
the previous description (J. c., p. 320), the following details 
may be added: 
Male—Head about as wide as thorax, face three-quarters as 
wide as eye; eyes nearly bare. 
*Published by permission of Chief of Bureau. 
