Hosts. Parasites. 
Pnlvanariaysp. On plume ssmeessessse eee = ae ae eta Coccophagus flavoscutellum. 
IPSeud GCOCCUSIACEIIS = — aie ame ee ete ee eee Coccophagus lecanii. 
SGU GC OCOC CUS sya C20 eae are ree eee alee ee Perissopterus mexicanus. 
iProsopophora‘on cottonwood ©2225 22-222-2---2 =.= -- ase Perissopterus pulchellus. 
Hniococcus azalec--..---2-----==- ROR See Nr aes Coccophagus immaculatus. 
Ceroplastesispa-=-a-+- -o-- 2. one ise eee eres serees Perissopterus mexicanus. 
Macthylopimsadestructors-: 2c. 2 osteo ee eee Coccophagus flayoseutellum. 
TiGeiAyA) OWIROINE SIL a semeios ok BaSseae pace oGeocHcmoacue se5¢ Coccophagus californicus. 
Kermes sp. on Quercus agrifolia. ...-..--.:.-.-=- eng Coccophagus scutatus. 
Family ALEYRODID#. 
AVON TOES TCOLMMris seeleciatislene = sacemce eee eee cee Eretmocerus corni. 
Aleyrodesninen pLiise1<ceyene sce e oe atic metre ne eee seine Pteroptrix flavimedia. 
WeMSiateee Sees eee eee caret ee ses Pteroptrix flavimedia. 
SOnchusissec<cpemes coe etue ns ys Sere ech cee Pteroptrix flavimedia. 
Wall ow se: o22 See als Sauce oees ace Pteroptrix flavimedia. 
Sambucus -..-- et SEA OA Sees aD aaa Pteroptrix flavimedia. 
guile iat 2. i/o Same 222 eae eae nce. Pteroptrix flavimedia. 
Quercusiaoritoligm=es]seeee see eee Eretmocerus californicus. 
WilOWeer. o.osksccecstee ete ce esse se Enearsia angelica, 
MeyrOdes Sp = evi se aca: -sebsesh cee soee ec eect cece Enearsia lnteola, 
ANALYSIS OF THE GENERA. 
Tarsi 4-jointed. 
Male antennz 3-jointed; female antenne 5-jointed .--.....-..------ Eretmocerus 
Anbennie olsbouhisexes (6-joimbed 2 seen eeeeee re ceha eee mere ee emia eee Pteroptrix 
Tarsi 5-jointed. 
Anterior wings with a hairless line extending obliquely and transversely to base 
of wing. 
Three antennal joints before the club of equal length -..--..-------- Mesidia 
Three antennal joints before the club of unequal length. 
Ovipositor exserted to from one-fifth to one-third length of abdomen, 
Notal sclerites normal, wings hyaline ...-.....-...------ Centrodora 
Mesopostscutellum acutely triangular; forewings with an irregular 
pattern of rather broad dark lines -.....-.---- Perissopterus 
Ovipositor not at all, or but slightly exserted -..-...-..------ Aphelinus 
Anterior wings without oblique transverse hairless line. 
Male antennew 4-jointed (one ring joint); female antennie 6-jointed (3 ring 
JOlNbS) -2 2262 -oee eens eens] Ae eee Plastocharis 
Antenne of both sexes 8-jointed. 
Clutb:apparently.2-joimted) 2.225 secon ee eee aeee eee eee Encarsi 
Club 3-jointed. 
Stigmal vein lacking; wings with very long fringe --Aspidiotiphagus 
Stigmal vein present; marginal cilia short. 
Marginal vein as long as or longer thansubmarginal-- Coccophaqus 
Marginal vein much shorter than submarginal. ..-.-.-Prospalta 
Antenne 7-jointed. 
Club composed of but one joint; ovipositor extruded to half length of 
abdomen .... 225.2) tenes ee ee eree ee eee ese ee {blerus 
