HESPERIDI: riiK (;enus tiianaos. 1445 



season l>y :i cluster of seven or eight wliite silken eoeoons of some ^Vpan- 

 teles, whose operations are otherwise unknown ; the caterpillar was dead and 

 shnmkon, and the parasite wintered over but never hatched. 



Desiderata. Particular attention should be paid in the north to the 

 history of this insect during the month of ycptember. Is the second 

 brood of butterflies a spurious one, never bearing progeny, or if so, to no 

 purpose? Harris states that the catcr[)il]ar may be found in ]May ; if so, 

 it hibernates in this stage, but proljably this statement is an error. The 

 time given for the duration of the chrysalis in August rests upon limited 

 observation and needs corroboration, and we have no knowledge of its his- 

 tory in the south beyond an early spring brood. Parasites of the egg and 

 caterpillar should be souglit. 



LIST OF ILLUSTRATIONS.— THOBYBES PYLADES. 



General. Chrysalis. 



PI. 27, fig. 8. Distrilaition in North Americn. pi. §5^ gg. 28. Chrysalis. 

 Eyj- Imago. 



PI. C6, fig. 7. Egg. P1.9, fig. 5. Male, both" surfaces, colored. 

 69:5. Micropyle. 13:15. Both surfaces. 



Caterpmar. 35:35. Male abJominal appendages. 



PI. 73, fig. 5. Caterpillar .at birth. 4I ; 3. Neuration. 



76 : 25. Mature caterpillar, side view. 4S : 3. Scales of the male imago. 



29. Same, dorsal view. 58: o. Side view of head and appendages 



80: 25-29. Front views of head, st.ages i-v. enlarged, with details of the structure of 



86 : 45. Dermal appendage at birth. the legs. 



SECTION U. 



Egg with vertical ribs much higher on the shoulder than below, the cross lines only 

 moderately frequent, and the cells less elongated th.in in preceding section. Cater- 

 pillar at birth with the dorsal thoracic shield inconspicuous. Mature caterpillar with 

 the head distinctly broader than high; frontal triangle not distinctly carinate; dorsal 

 thoracic shield not conspicuous. CArj/sa/is with the raesonotuin uot so long as its greatest 

 width; cremaster slight, elongated, /ma^ro comprising species of smaller size; hind 

 wings rounded ; medi'an forking sooner than subcostal vein on hind wing; club of an- 

 tenna sickle shaped ; last palpal joint linear, four or more times longer than broad. 

 Wings fully expanded in repose by d.ay. 



Genei!a : Thanaos, Pholisora, Hesperia. 



THANAOS BOISDUVAL. 



DUSKY WINGS. 



Thanaos Boisd.,Icon. Lep., 240 (1832-1833). NisoniadesStephens(1850), nee Hiibner (1816) ; 



ErynnisRambur (1858), nee Schrank. (1801); cf. Scudd., loc. cit., 228. 



cf. Scudd., Proc. Araer. acad., x: 167-168. Type.-Papilio tages Linn. 



Oh, could I fly, I'd fly with thee! This butterfly of human breath 



We'll make, with jovful wing, Is followed last and far by Death • 



Our annual visit o'er the globe, Some flower of life it settled on ' 



Attendants on the Spring. He clasps and crushes, but, 'tis gone! 



Logan.— To the Cuckoo. Gerald xVIassey.— Life and Death. 



Imago (57:7). Head large, profusely clothed with long, forward curving hairs, 

 sometimes arranged to a considerable extent in transverse rows ; at the outer base of 

 the antennae a very long and slender, tapering, curving pencil of bristly hairs, fully 



