cerostoma] PLUTELLIDAE 701 



12. C. sequella, CI. 17-19 mm. Head and thorax white. 

 Forewings ochreous-white, with a few black strigulae, especially 

 on basal lialf of costa ; a spot beneath costa near base, two 

 inwardly oblique irregular sometimes interrupted marks from 

 costa al)Out middle and |, and three rather elongate nearly con- 

 fluent dorsal spots black. Hindwings grey. 



England, rather local ; C. Euroj^e, Asia Minor ; 8, 9. Larva 

 on Salix ; 5, 6. 



13. 0. vittella, L. 17-19 nun. H ead light grey. Forewings 

 pale grey or whitish-grey, sometimes brownish-mixed, sprinkled 

 or strigulated with dark grey, sometimes more or less wholly 

 suffused with blackish ; a blackish or dark fuscous streak along 

 dorsum, forming triangular projections upwards before and 

 beyond middle. Hindwings grey. 



Britain to the Cl^'de, common ; C. Europe, Asia Minor ; 7, 8. 

 Larva l)rown- blackish ; dorsal stripe broadly whitish : on elm 

 and beech ; 5, 6. 



(3. Plutella, Schrk. 



Head with appressed or loose scales. Antennae |, somewhat 

 thick basally, in $ simple, basal joint with dense anterior flap 

 of scales. Labial palpi long, recurved, second joint beneath 

 with more or less developed dense projecting tuft, terminal as 

 long as second, acute. Maxillary palpi moderate or short, 

 filiform, porrected. Forewings : 7 and 8 separate. Hindwings 

 1, elongate-ovate or ovate-lanceolate, cilia |- l-y ; 3 and 4 some- 

 what approximated or connate, 5 and 6 sometimes stalked, 7 

 parallel. 



A small cosmojjolitan genus, of which the species are some- 

 times artificially spread. Imago with forewings elongate, 

 narrow, termen very oblique ; antennae porrected in repose. 

 Larva attenuated towards extremities ; feeding in a slight web 

 on leaves of Cruciferae. Pupa in an open network cocoon. 



1. Tuft of palpi long . . . .2. 



,, ,, very short . . . .3. 



2. Forewings fuscous . . 2. crucifh-arum. 



,, ochreous suffused with whitish 1. porrectella. 



3. Dorsum with an ochreous-whitish streak 3. anmilateUa. 



,, with three whitish spots . 4. dalella. 



1. P. porrectella, L. 15-16 mm. Head ochreous-whitish, 



with central fuscous line. Tuft of palpi long. Forewings pale 



ochreous, suftusedly streaked with whitish ; costa and dorsum 



blackish - dotted ; a whitish subdorsal longitudinal line, thrice 



