256 



sericeus has the anteimal 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 ApheUnus mytilaspidis 

 LeB.jA. 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. C. 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 geuus 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 GhUoneurus 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 Von 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 u. sp. 



Femah. —I^ength, 0.93 ™'" ; expanse, 2 """ ; greatest width of fore-wing, 0.39 """. 

 Closely resembles the European C. microphagusMayT, the only difference from Mayr's 

 description being that the wings are colorless instead of clouded with brown. First 

 funicle joint of antennfe shorter than pedicel, about as long as broad; joints 2, 3, 

 and 4 slightly shorter than 1, but about as broad; joints 5 and G longer and consid. 

 erably Avider, 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; antenn;e brown, tip of pedicel and all of 

 funicle joints .5 and 6 dirty yellow; front cox;e, all trochanters, base and tip of all 

 tibiiB 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. 



