HESPERIDI: THANAOS LUCILroS. 1467 



fly on May 3, after more than six weeks in chrysalis. As appears from the 

 abo%-e, the spring brood is made up of the progeny of all the broods of 

 the preceding year, and the July butterflies are the only ones which come 

 solely from the progeny of the brood immediately preceding it. 



The butterfly, even the male, is described by Mr. Lintner as fond of 

 hovering over the blossoms of Aquilegia. 



Parasites. It is not a little strange that with the considerable number 

 of caterpillars IMr. Lintner and I have had, no parasite has yet been 

 found attacking them ; but I have reared the tiny Trichogramma interme- 

 dium (89 : 8) from the egg. 



Desiderata. The few instances in which this butterfly has been carried 

 through its early stages present such an unusual variety that a great many 

 more observations are needed to make the relations of the broods to each 

 other perfectly clear. Why is there such diversity in the length of the pupal 

 condition ? is it in any way correllated with lethargy of the caterpillar ? 

 How large a proportion of the caterpillars of a given brood contribute .to 

 the second or third brood beyond ? AVhat is the fate of the late butterflies 

 or of their progeny ? It would appear as if the butterflies which come out 

 or fly after the middle of September were a waste of nature. Do the 

 caterpillars ever successfully hibernate before they are full fed ? What is 

 the relative abundance of the three broods of the butterfly ? What are the 

 natural conditions under which the caterpillars pass the winter? Can 

 it be in nests made from the leaves of the food plant, such as they 

 have dwelt in as caterpillars, when the whole plant fails to the ground before 

 the winter ? The characteristics of the flight and postures of the butterfly 

 have not been described, and our knowledge of its distribution is manifestly 

 very imperfect. Does the hind tibial pencil of hairs of the male distribute 

 an appreciable odor, and if so, what is it like? Are there no larval para- 

 sites ? 



LIST OF ILLUSTRATIONS.-THANAOS LUCILIUS. 



General. P'* S-' ^S- ^^- Leaf, as bitten to form nest. 



P1.28,fig.2. Distributionia North America. 86:28-30. Eggshowing progressive attack 



89:8. Trichogramma Intermedium, a on the shell by the enclosed larva. 



parasite. 46,47. Dermal appendages of cater- 



_ pillar at birth. 



Egg. ^ 



PI. 66, fig. 14. Egg. Chrysalis. 



69-3 6. Micropyle. PI. 85, fig. 30, 31. Chrysalis in outline. 



' ' ' ^ ' .„ 32. Chrysalis. 



Caterpillar. 



PI. 73, fig. 2. Caterpillar at birth. Imago. 



77:8. Front view of head, mature cater- PI. 9, fig. 4. Male, both surfaces. 



pillar ; colored. 36 : 4-6. Male abdominal appendages. 



9. Mature caterpillar. 47 : 4- Scales of the male imago. 



80 : 31-35 Front views of head, stages 1-v. 



