7282 . Insects. 



of Linnaeus, and been called the same by Hubner, Ochsenheimer, Go- 

 dart, Boisduval and Staudinger, and even if S. Muscaefovmis has the 

 right in priority, this is not the time to make any alteration, as 

 diversity of nomenclature between our lists and those of the continent 

 is very undesirable. If any alteration ever takes place it must be done 

 when a thorough revision of the group is made ; for, as there is 

 another species bearing the title of Muscasformis by Duponchel, 

 Boisduval and Herrich-Schseffer, it would not do to have (particularly 

 in one genus) two insects bearing the same name, I shall therefore in- 

 troduce it by its usual appellation and give a description. 



Sesia (Fa5.) Philanthiformis, Linn., Lasp. 



Sesia Philanthiformis, Linn., Lasp., Hub., Och., Godt.y Boisd., Staud. 

 Trochilium Muscaeformis, Esper. 



Fronte nitido-caeruleo-nigro. Palpis albis, margine externo apice- 

 que nigris. Antennis caeruleo-nigris, in mare dentibus spi- 

 natis et ciliatis, infra flavis plus vel 'minus a base, in foemina 

 infra fuscis, supra apicem versus macula magna alba ; qua 

 macula in mare imitata est squamis parcis fuscis vel flaves- 

 centibus aliquando obsoletis. Abdomine supra caeruleo- 

 nigro vel metallico-fusco-nigro squamis flavis consperso, in 

 insecta typica cum annulo in marginibus posterioribus 2, 4, 6 

 segmentorum, in varietatibus 1, 2, 3, 4, 5, 6, vel 2, 4, vel 2, 7 

 argenteo-niveo saepe flavescente. Fascicule terminali in 

 mare supra subfusco, infra flavescente, in foemina supra cen- 

 tro sordido et subflavescente, lateribus subflavescente, infra 

 sordido. 



Size of the male 7 — 8 lines ; of the female 6 — 9 lines. 



Forehead bluish black, two chalk-white patches in front of the eyes. 

 Palpi chalky white, with the outer margin and apex black. Posterior 

 margin of the head (collar) yellow. Antennae in the male bluish 

 black above, underneath more or less yellow from the base, but dis- 

 continuing a third (if not before) from the apex ; in the female 

 brownish underneath ; a third from the apex on the upper side is a 

 large white patch (the patch varies), which in the male is represented 

 by a few obscure brownish yellow scales, and in some specimens are 

 obsolete. Prothorax and mesothorax on the upper side are shining, 

 bluish black, on which is a dorsal yellow line, more or less narrow or 

 shorter and longer. Metathorax brownish black above, blended 

 with yellow scales, having on each side long yellow or hoary hairs. 



