LBPIDOPTERA. 



87 



with our specimens, and in the anal region two ocellate spots of equal size are also apparent. I conclude 

 with the remark that, regarding the three species last enumerated, I have used every means within my reach 

 to form a correct determination ; but they are so nearly allied to each other that further comparisons are still 

 required : several other species are found in collections, of similar habits, but each possessing an individual 

 peculiarity. No. 19 of our list, agrees upon the whole with the Parrhasius of systematic authors ; but I have 

 some apprehension that further comparisons of perfect specimens will prove it to be distinct from the 

 species described by Fabricius with that name. 



Genus THECLA. 

 Papilionis — Plebeiorum ruralium-species. Linn. Theclae species. Fab. Polyommati spe- 

 cies. Latr. ^ Thecla. Stephens. Papiliones, Fam. O. Larvae depressoscutatas. Wiener 

 Verzeichnis, 185. Les petits Portes-queue. Geoffr. Hairstreaks. Haworth. 



Character. Larva lineari-oblonga, dorso piano, depresso; tota pilis brevissimis teneris solitariis 

 obtecta (Tab. iv. rig. 3 et 4. Subgenus Amblypodia : Amb. Apidanus, Amb. Helm.) : vel inter- 

 dum fasciculis pilorum ad segmenta transversim ordinatis praedita (Tab. iv. fig. 2. Thecla Xeno- 

 phon) : capite parvo retractili. 



Chrysalis oblonga, utrinque obtusa, vel antice gibba postice attenuata, nuda, lasvis, rarius trans- 

 verse scutata. (Tab. iv. fig. 2, a; 3, a; 4, a; 5, a.) 



Imago : Antenna mediocres, strictas ; vel basi filiformes capitulo subabrupto, elongato, cylindrico- 

 ovali ; vel, de basi usque ad apicem sensim incrassata?, capitulo haud distincto, obtuso, rarius 

 acumine brevi praedito; articulis intermediis longioribus. 



Palpi capite longiores, articulo basilari brevi, capiti adpresso, concavo, latiusculo, squamis densis 

 obtecto, villis elongatis paucioribus vel creberrimis, intersitis; articulo secundo elongato, stricto, 

 subassurgente, ultra medium capite soluto, apice truncato, undique squamis imbricatis teneris 

 arete obtecto, villis, in quibusdam crebris, interpositis ; articulo tertio abrupte imposito, porrecto, 

 oblongo vel subattenuato, nudiusculo vel lanuginoso, nonnunquam squamis tenerrimis obtecto. 



Proboscis palpis magis duplo longior, apice ciliato, villis brevibus patentibus. 



Caput breve, obtusum, latum. Oculi planiusculi, pube brevi arete obtecti. Corpus breve, atte- 

 nuatum. Ales anticae oblongae, breves, obtusse; posticas rotundatas vel subelongatae, appendiculo 

 anali et caudibus filiformibus vel rarius appendiculis brevibus obtusis subdentiformibus, instructae. 

 Pedes antici maris, tarsis articulo solitario, cylindrico, elongato ad latera spinoso, ungue brevi 

 obscuro, inflecto, vel omnino inermi, superficie plana verticali abrupte terminato ; fceminae 

 tar%is quinque, cylindricis, primp elongato, secundo, tertio, quarto brevibus, quinto subincrassato, 

 unguibus duobus brevibus arcuatis, villis densis reconditis, pulvillis plus minusve conspicuis, 

 appendiculis duobus filiformibus brevibus intermediis; pedes medii et postici in utroque sexu 

 conformes, singuli tarsis quinque articulatis, ultimo unguibus duobus minimis arcuatis sub pul- 

 vdlis et squamis fere occultatis; femora intermediorum eadem quae Polyommati. 



Character. Larva linear-oblong, with an uniform depressed back, either covered with short, 

 delicate, solitary hairs, as in Amblypodia Apidanus and Helus (PL iv. fig. 3 and 4) ; or with tufts of 

 short bristles, arranged in transverse rows at the segments, as in Th. Xenophon (PL iv. fig. 2) ; or 

 entirely naked, as in Amb. Longinus (PL iv. fig. 5) ; in this species the larva has a peculiar charac- 

 ter, being distended anteriorly, excavated at the sides, contracted behind, and throughout trans- 

 versely swelled at tfoe segments : the head in all these subdivisions is small and retractile. Chry- 

 salis oblong, obtuse at both ends, or considerably swelled anteriorly and tapering towards the 



posterior 



