-^'"■1-1 EILEY AXD MOXELL OX APIIIDID^E. 17 



fiul)oqual; 4 distiuctly clavate; 3 as long as the two preceding togotlicr. Wings 

 s!ibli\-uline, of a Avliitish tinge; snbcostal vein and the inner margin of the stig:na 

 bUick; oblique veins whitish; stigma short and broad, not angled at the base of°the 

 stigmal vein, which starts from a little behind its middle, and is comparatively straight, 

 thereby making the apical cell rather narrow. Terminal distances between the veins 

 subequal, that between 2d diseoidal and cubital somewhat greatest ; basal one-third 

 of the cubitus hyaline, but not abortive, as it can usually be traced to its base, which 

 is very close to that of the second diseoidal; bases of the two discoidals either ap- 

 proximate or quite contiguous; discoidalsof the hind wings proceeding connectedly 

 from the subcostal vein. Larva vdth 5-joiuted antenme, and the promuscis extending 

 beyond tip of abdomen. 

 June— Jidy; Saint Louis, Mo. (Eiley); Clinton, N. J. (Prof. W. D. Eobbins). 



PEMPHIGUS FEAXIKIFOLII, n. sp. 



[Infesting the terminal leaves of Fraxinus amcrlcanm and F. samhiicifolia from spriu"- 

 till late summer, and producing a twisted curl thereof; the vonn"- lice varvino- in 

 color from deep glaucous to li\dd, very lloceulent and exucUug the liquid globules cniite 

 copiously. Wiugedfemalesappeariugearly in June.] 



Pkmpiiigus fkaxinifolii, n. si^.— Wiiigcd fcmcdc : Alar expanse 5.7^™. Head and 

 thorax duslcy : abdomen dark green : antennic reaching by the length of the apical 

 Joint beyond costal base of front wings ; inconspicuously annulated and with joints 

 o— 6 but moderately narrowed at base ; joint 3 as long as 4 and 5 together ; G (including 

 unguis) nearly fths as long again as 5, with the unguis distinct and of normal length^ 

 Scutellar lobes of mesonotum broad and well marked. Legs normal. Wings hyaline ; 

 stigma linear, or not wider than subcostal space, yellowish and poorly defined "anteri- 

 orly; veins very slender and sub-hyaline, the stigmal most distinct, starting a little 

 in front of middle of stigma, and but faintly curved; cubital almost invisible, but not 

 obsolete at base, where it nearlyjoins the 2d diseoidal. Terminal spaces between 1st 

 and 2d discoidals, and between this last and cubital, subequal; that between cubital 

 and stigmal ouly half as great. Discoidals of hind Avings proceeding connectedly 

 from subcostal. Promuscis reaching beyond front coxa? ; abdomen with 7 rather larg-e 

 roundish spots each side, each sending out 2 hairs. [In some specimens the cubital 

 starts independently from the subcostal; in others it joins the 2d diseoidal a short dis- 

 tance fi'om base. ] Fnpa with the 3d joint of anteinne relatively somewhat shorter. 



Lan-a of proMhle second (jmcratiou : Antennai smooth, 4-joiirted; joint 3 somewhat 

 longer than 4, and as long as 1 and 2 together; apical nipple i^th as long as the 4th 

 ioiut. Promuscis slender, reaching beyond hind coxiu. Legs rather long and stout. 

 Tibiie, tarsi, and anal joints of abdomen Avith a few conspicuous hairs. Full-grown, 

 apterous female, probably of this same generation, ditters iu having 6-joiutedantenn<'e, 

 proportioned much as in the winged female. 



Larva from winged female ; i)rohahJe fourth generation: Antcnufe 5-jointed; joints 1, 2, 

 3, 4, subequal in length ; 3, 4, stouter ; 5 very short and rounded at tip. Promuscis very 

 long, reaching beyond tip of abdomen. 



Tolerably common at Saint Louis, Mo. (Eiley, Monell) ; Sauk City, Wis. (Thomas). 



The life-history of this insect has not been fully studied, as the sexed 

 individuals and the winter egg ha^^e not been observed. It will doubt- 

 less be found to agree in most pta-ticulars wiWi that of Sduzoneuraameri.- 

 cana. 



The species stands somewhat in the same relation to the European 

 Pemphigus fraxi in (Fabr.)* as does Schizoneura americana to IS. "Klml. 

 The European species is larger, with the wing-veins differently placed, 

 and inhabits the twigs and stems, instead of the leaves ; but otherwise 

 there is a, good <leal of resemblance between the two, 



* brntcHu', Schrauk. 



Bull. V, 1 -2 



