2 BULLETIN 778, U. S. DEPARTMENT OF AGRICULTURE. 
HISTORY AND DISTRIBUTION. 
This rose pest, together with a closely related species, Déiplosis 
rosivora Coq., was first collected in New Jersey, in 1886 (1). It was 
collected later in New Jersey in 1889, in New York in 1890, in the 
District of Columbia in 1891, 1894, and 1896, in Massachusetts in 
1894, and in Chicago, Il, in 1897 (2, p. 15).. In 1903 specimens 
were sent to the Bureau of Entomology from Cleveland, Ohio, in- 
festing the Meteor variety, with the report that as many as 35 larve 
had been taken from a single bud. Apparently the same insect was 
received from Cincinnati, Ohio, in 1905, where it was seriously dam- 
aging the buds and tips of the La France and Duchess of Albany. 
Notwithstanding the fact that in the houses containing both varieties ~ 
the heat was turned off throughout the entire winter, the corre- 
spondent reported that the hibernating midge was not killed. 
In 1911 a heavy infestation of the variety My Maryland was re- 
ported from Rhode Island, and in 1915 Hewitt (5) recorded the oc- 
currence of this midge in a garden at London, Ont., infesting shoots 
of the variety Mrs. J. Laing. In 1916 Gibson (8) reported it from 
the same locality and also in greenhouses at Toronto, Ont. Snod- 
grass (7) includes the rose midge among the important insect pests 
of Indiana, and Crosby and Leonard (6) state that it attacks roses 
grown in the open in New York. we 
_ Although the rose midge has been reported frequently from several 
States, it does not necessarily follow that these infestations are still 
in existence, since some of the varieties subject to infestation have 
been given up for more resistant and profitable varieties, and in 
others the insects may have been exterminated by the use of insecti- 
cides. Rose houses in the District of Columbia were repeatedly in- 
spected during the past two years, and no infestations were located. 
DESCRIPTION: 
EGG. 
HIG AA. 
Egg elongate ovoid, yellowish, about 0.32 mm. long and 0.075 mm. in width. 
LARVA. 
jew Tha 
Full-grown larva about 1.8 mm. in length, 0.45 mm. in width, reddish in color, 
obtuse and tuberculated on posterior segment, tubercles bearing minute apical 
spines, lateral margins distinctly compressed, attenuated anteriorly, breast-bone 
distinct, with distinct black spot on upper side immediately in front of breast- 
bone. 
PUPA. 
MiG. a Ve 
Length of pupa 1.6 mm., width 0.53 mm.; color varying from reddish to red- 
dish yellow, eyes black at time of emerging from cocoon, legs and antennz 
approaching black with head and prothorax dusky; all segments except first 
1The descriptions of the egg, larva, and pupa are compiled from Webster (2, p. 21—23) ; 
that of the adults is copied| verbatim from Felt (4). 
