44 Mr. Westvvood on a gregarious Butterjiy from Mexico. 



EucHEiRA, Westw. 



Palpi capitis longitudine articulis 3, duobus ultimis subsequalibus. 



Antennee capitulo elongate sensim incrassato. 



Pedes antici insigniter perfecti, coxis valde elongatis, tarsis elonga- 



tis 5-articulatis. Tarsi pedum omnium unguibus elongatis bi- 



iidis pulvillo magno centrali appendiculisque duobus laterali- 



bus membranaceis instructi. 

 Ala anticce integrse; posticce rotundatae, angulo postico paulo pro- 



ducto, cellula postice clausa. 



Larv(B ? nidi subpapyracei communis incolae. 



Pupce Cauda tantum suspensse, capita obtuso, tuberculis destitutse. 

 Genus osculans Hipparchiidas cum Papilionidis conjungens*. 

 Sufficient information is also afforded by the specimens extracted 

 from the chrysalides to enable me to give the following specific cha- 

 racter. 



EuCHEIRA SOCIALIS, WeStW. 



Alis nigro-fuscis, anticis macula parva albid^ versus apicem cel- 

 lulse discoidalis, serie macularum (magnitudine irregulari) pone alae 

 medium et cum margine postico parallela, serieque altera macula- 

 rum 4 parvarum, elongatarum, submarginalium, albidarum ; posticis 

 serie centrali macularum irregularium alteraque serie punctorum 

 submarginalium albidarum. 



Expansio alar. circ. 2-|- lin. 



Habitat in Mexico. 



* I do not adopt Dr. Horsfield's terms for the stirpes of the Butterflies, Anoplu- 

 rimorpha, &c., since the same system of names is applied to them as secondary divi- 

 sions of an order, as that established by Mr. MacLeay (upon similar analogical con- 

 siderations) for the primary divisions of the Coleoptera. Moreover, Dr. Horsfield's 

 groups seem quite equivalent to the groups, to which, in adoption of Mr. Kirby's 

 admirable views, the family termination in ider is aflSxed. 



PLATE VI. 



Fig. 1. The nest described in the pre- 

 ceding memoir, represented one half 

 of the natural length. 



Fig. 2. The same opened, showing a 

 portion only of the pupae. 



Fig. 3. A pupa nearly arrived at the per- 

 fect state, with the wing-case scaled 

 off, seen sideways. 



Fig- 4. Ditto, seen from the front. 



Fig. 5. An antenna stripped of its case. 

 Fig. 6. A labial palpus, ditto. 

 Fig. 7. An upper wing, ditto. 

 Fig. 8. A lower wing, ditto. 

 Fig. 9. A fore leg, ditto. 

 Fig. 10. A hind leg, ditto. 

 Fig. II. The claws and pulvilli more 

 strongly magnified. 



