276 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 4 A NEW SPECIES OF COCCOPHAGUS WITH A TABLE OF THE HOST RELATIONS OF THOSE SPECIES OF THE GENUS KNOWN TO THE WRITER By L. O. Howard Coccophagus is a widespread and important internal parasite of certain scale-insects, and is practically confined to the non-Diaspinse. Were it not for some of the extraordinary results of rearings carried on at the parasite laboratory at Melrose Highlands under the direc-tion of Mr. W. F. Fiske and of others at the boll-weevil laboratory at Dallas under the direction of Mr. W. D. Hunter, I would state that the species of this genus are invariably primar}^ parasites, but such statements as this in the light of these recent investigations must be more guarded. The probabilities, however, point towards invariable primary parasitism. The present species under consider-ation is the largest of the genus so far described and is quite distinct from its congeners. Subfamily Aphelinin^g Howard Genus Coccophagus Westwood Coccophagus albicoxa, n. sp. Female. — Length 2.6 mm., expanse 5.4 mm., greatest width of forewings 0.6 mm. General color shining black; apical half of mesoscutel-lum lemon-yellow with a central shade of the black descending somewhat into the yellow; all femora black; front and middle coxai black, hind coxae yellowish white; edge of metapleurum caudad of spiracle yellow; middle and hind tibiae black, front tibiae only dusky ; front tarsi brownish; middle and hind tarsi light yellow; antennae black, tip of pedicel brown. Mesonotum very faintly shagreened. Apical bristles of mesoscutellum very long; mesopleurum perfectly smooth, shining; abdomen smooth, shining, very faintly shagreened, much more faintly than mesonotum; wing veins dark brown; wings hyaline, iridescent. One female reared by H. J. Quayle from Physokermes insignicola received from Lampoc, California. U. S. N. M. Type No. 12170. The following table indicates the .host relations of such species of the genus as are known to the writer: Parasites Hosts Coccophagus lecanii Fitch Lecanium quercitronis Fitch Lecanium quercifex Fitch Pulvinaria innumerabilis Rathv. Pulvinaria acericola (Walsh & Riley) Lecanium pruinosum Coq. Lecanium persicae (Fab.) Lecanium on plum Phenacoccus aceris (Sign.) Coccus hesperidum Linn. Coccophagus fratemus How. Lecanium persicae Fab.