88 BK<inKLVX IXSTITUTE ML'SKU.M. SCIKXCK lU-LLETIN 2. 4. 
( )ne male and sevt-ral females ut the well marked new 
s])eeies ol' /'.in ymcfopiis which I (le-cril)e liei-ewilh were 
taken hy .Mr. .Altir|)h_\- I'mm Pidinctlca inclannMirxs ( Sonth 
Atlantic: K. C. M., 140(1) ( 'ssifraga gigantca (Simth Atlantic; 
k. C. M., i^-"^,^). and Tlialassogcroii chlororhyiichus (Si>tith 
Atlantic; K. C. .M.. 1405). The differencex hy which it can 
readily be diNtin^ui^hed from /;. tannis. are its ^mailer size 
(but larger than /;'. f^ncihciis), its different proixirtions as 
regards length and lircadtli n{ whdle hnd\- and ihc xarions 
parts, head, tlmrax and ahddnien. the new specie^ being e\er\- 
where nmre slender, that is, less brnad in prdp^riiini to its 
length, its narrnw, lunger signattire, and the less ])riin(innced 
modilicalion dl' the anlenn;e of its male. Ihiwexer, this modi- 
ficatidn ( i. e. the difference between the female and male 
antenn;e ) is well marked eni lugh to be immediately notice- 
able. Re\-. James Waterston of the Shetland Ids., informs me 
that he has s]iecimens of a liiii-Yiiicln/^its in which the antenn;e 
of the male are wliolh "simjile," i. e. \vithout anv sign of 
a]i])en(lage on. or exi)ansii;n of tmusnal extension of an\- of the 
segments be_\ond what is shown in the female, b'rom m\- rather 
large collection of liiiryiiictuf^iis material, representing speci- 
mens from \arions albatrosses, jietrels and allied 1)irds from 
various oceans. 1 can ]iick otit at hrst ins])ection. examples of 
at least three s]iecies, naniel}' /;'. faiiiiis X. (t\-])e species of 
the genus I coming from Atlantic and Indian ( )cean alba- 
trosses, H. pacificiis Kellogg, from Pacific and .\rctic alba- 
trosses, and E. iniir/^liyi Kellogg, from South .\tbnitic hosts. 
Female, len.y;tli .Vw niiii, : width \J<J 111111.: head, leiit^th i.ji mm., 
wirlth i.iS: narr<i\v-iinihe.l f..rm. with ihe secniidary sex differences of 
the male antemia- mucli less |,n nKiuiiced than in /;. Idnnis and also less 
th.an in /;'. pui-ificiis. Init still ver>' (ihvidns. 
llead nut i|iiite as wide as Icini; ( llie lie.id is mie-fifth wider than 
Idtit; in fiiiiriis. and \ ery sli.<.;litlv wiiler ih.aii fmj,' in facificiis) with 
siiinature limber than wide, hein- ^t el>'ni.:ate sliield slia])e instead of 
jjroad and sli..ri shield shape as in taiinis: the clear area all anmnd the 
signature is \er\ well distinguished ami wider than in taunis; antenna? 
simple ( i. e. im unusual extension <if Jiid segment and angulation of 
3rd segment as in taiinis. ) 
Pro- and niel.i-tlK.r.ix Uigether fniger tli.in hr(.ad (the meta-thorax 
in taiinis is as hr. .ad as the length of \>rn- and meta-th. irax taken 
together); middle uf imsterior margin of met.athnrax stnuiglv angulated 
