Vol. I] WILLIAMS^BUTTERFLIES AND HAWK-MOTHS 305 



were parts of South Albemarle Island and Cowley Mountain, 

 on the same island. 



E. galapageiisis was also secured on the Albatross Expedi- 

 tion in 1888, but in too poor condition to be described; it is 

 also reported by A. Agassiz. There are ten specimens in good 

 and fair condition in the U. S. National Museum, labeled 

 Hood, Chatham, and Duncan Islands, Galapagos, 1891, and a 

 series was also taken on the Hopkins-Stanford Expedition in 

 1898-9. It is not improbable that other expeditions also 

 secured it. 



Thirteen specimens were taken on the California Academy 

 of Sciences Expedition, one of these being in possession of Dr. 

 H. Skinner to whom it was referred. The specimens are from 

 Chatham, Albemarle, and Charles Islands, others seen but not 

 taken on James, Indefatigable, and Duncan Islands. 



Expanse : $ 37, 38, 40, 40, 41, 43, 43=40.3 mm. 



9 42, 45, 46, 47, 48=45.6 mm. Plate XX, fig. 6. 



HETEROCERA 

 SPHINGIDAE 



The following are the Hawk-Moths known to occur in the 

 Galapagos Archipelago : 



Triptogon lugubris Linn. 



Deilephila lineata Fabr. 



Theretra tersa Linn. 



Dilophonota ello Linn. 



Dilophonota obscura Fabr. var. conformis Roth, and Jordan. 



Phlegathontius rustica Fabr. form calapagensis Holland. 



Phlegathontius rustica Fabr. var. nigrita Roth, and Jordan. 



Phlegathontius leucoptera Roth, and Jordan. 



Phlegathontius cingulata Fabr. 



1. Triptogon lugubris Linnaeus, Mant. Plant 537, 1771. 



The specimens are somewhat smaller than the continental 

 examples with which I have compared them, otherwise they 

 cannot be said to differ from the latter. 



Abbot and Smith's description of the mature larvae of this 

 insect, as quoted by Morris in his "Synopsis of the Described 

 Lepidoptera of North America" reads : "Head dark green, 

 with a yellow frontal band. Body pale green, with vascular 

 dark green dashes, and a dark green subdorsal line bordered 



September 28, 1911 



