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. 



