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sericeus has the antennal club not compressed and the front coxae nar- 
rowly separated ; it lives in coniferous trees, where the female constructs 
longitudinal galleries, as figured above. A new genus will have to be 
erected ultimately for this species, but for the present it appears to be 
much better placed in Hylurgus than in Hylesinus. 
A NEW PARASITE OF MYTILASPIS POMORUM. 
By L. O.Howard. 
The well-known oyster-shell bark-louse of the apple has a number 
of true parasites in the United States, although none have been else- 
where recorded. Those previously recorded are Aphelinus mytilaspidis 
LeB., A. abnormis How., A. fuscipennis How., and Anaphes gracilis How. 
During the past summer a fifth species has been received from Mr. John 
T. Boggs, of Liberty, S. 0. It proves to be a new species of the genus 
Chiloneurus, to which I have given the specific name C. diaspidinarum, 
for the reason that it is the first species of the genus known to parasi- 
tize an armored scale insect. It is a very small species, as is necessary 
from the size of its host, is dark in color, and rather closely resembles 
the somewhat aberrant European Chiloneurus microphagus Mayr, the 
two together forming a distinct type in the genus. Concerning the 
habits of the European species we only know that it was reared from a 
scale-insect on oak by Yon Heyden, and that two specimens were cap- 
tured in June and August by Reinhard. It was named Eucomys micro, 
phagus by Foerster in 1856, but without description, and was first 
described by Mayr in 1875. The American species may be described as 
follows: 
Chiloneurus diaspidinarum n. sp. 
Female. — Length, 0.93 mm ; expanse, 2 mm ; greatest width of fore-wing, 0.39 mm . 
Closely resembles the European C. microphagus Mayr, the only difference from Mayr's 
description being that the wings are colorless instead of clouded with brown. First 
funicle joint of antennae shorter than pedicel, about as long as broad; joints 2, 3, 
and 4 slightly shorter than 1, but about as broad; joints 5 and 6 longer and consid- 
erably wider, wider than long; club flattened oval, as long as four preceding funicle 
joints together; scape cylindrical, not expanded. Head thick antero-posteriorly ; 
vertex long and narrow, shagreened, ocelli forming an acute-angled triangle. Silvery 
pile of mesoscutum rather sparse, interrupted on posterior border ; mesoscutellum 
well rounded, densely shagreened above, smooth behind, tuft of bristles compact 
but not erect; abdomen flat, ovipositor very slightly extruded. General color shin- 
ing black, vertex, cheeks, pleura, and abdomen with bluish metallic reflections; 
mesoscutellum with coppery reflections; antennae brown, tip of pedicel and all of 
funicle joints 5 and 6 dirty yellow; front coxae, all trochanters, base and tip of all 
tibiae and all tarsi, except terminal joint, light yellowish. Wings clear; marginal 
vein short, as long as or little shorter than stigmal; post-marginal equal in length 
to stigmal; marginal cilia extremely short. 
Described from two female specimens reared September 26 from 
female scales of Mytilaspis pomorum received from Liberty, S. C. 
