1858 REPORT OF THE CHIEF OF ENGINEERS. 



This widespread and common species was observed on the route generally. Besides 

 being found in all parts of the United States and Territories; it is common in Mexico, 

 Central America, and most parts of South America, down to Patagonia inclusive. 



Genus NISONIADES Hub. 

 Nisoniades Persius. 



Nisoniades Persius, ScUDDER, Proceedings Essex Institute, iii, p. 170 (1862). 



One male at Rio Chama July 7. This is another of those species having a range 

 from the Atlantic to the Pacific. 



HETEROCERA. " 



Family SPHINGIDJE. 



Genus MACROGLOSSA O. 

 Macroglossa Senta, n. sp. 



Male expands 1^ inches ; above, tho head, thorax, and first two and part of third seg- 

 ment of abdomen heavily clothed with olivaceous hair ; beneath the first three seg- 

 ments of abdomen are black; the remaining ones pale sulphur-yellow with black in 

 the middle ; anal tuft black ; antennae black. 



Beneath, head and body are yellowish- white; legs clothed with yellowish- white hair. 



Upper surface, wings hyaline, with the veins dark brown. Primaries, costa blackish ; 

 exterior margin of moderate width, widest at apex, scalloped on its inner edge, but not 

 deeply, Indian-red in color, brighter at apex and between the last two cells at and near 

 the inner angle: in the middle this border is sprinkled or suffused with brownish; 

 fringe dark brown; inner margin Indian-red, narrow at and near the inner angle, 

 becoming very broad from middle of inner margin to base. , 



Secondaries have a narrow exterior margin of dark brown, slightly sea Hoped inwardly, 

 and showing traces of red toward inner half; abdominal margin broad and reddish, 

 brightest at anal angle. 



Under surface, wings: Primaries, costa pale yellowish from base to over or about 

 half its length; terminal half sprinkled heavily with dark brown; exterior margin 

 with the red not as dark as above, but brighter; inner margin also not as dark at its 

 outer half, and pale yellow toward and at base. 



Secondaries with basal part, costa, and inner margin pale yellow : exterior margin 

 red; fringes of all wings brown. 

 - One male ; Fierra Amarilla, New Mexico, July 10. 



This beautiful little species is far inoreslender and delicate than Diffinis or allies, and 

 its position would be between the group of which Diffinis 13. is typical and the other 

 composed of such species as Thy she F. Gvacilis Grote, &.c. It can be distinguished at a 

 glance from any other known American speci s. 



Family ZYG.EXID^E. 



Genus CTENUCHA Kirby. 

 Ctenucha MatthewL 



Scepsis Matthewii, Edwards (Hy.), Proceedings of the California Academy of Sciences, v, 1S4 

 (1873). 



August 13, several near the headwaters of the Rio Blanco. 



This is closely allied to Ctenucha Fulvicollis Hiib., but is of larger size and paler color 

 throughout. It is a species having considerable range, the type from which Mr. Hy. 

 Edwards described it having been taken in Vancouver's Island. 



Ctenucha Cressonana. 



Ctenucha Cressonana, Gbote. Proceedings Entomological Society of Philadelphia, ii, p. 64. t. 

 8, f. 5 (1863). — Stretch, Illustrations of Zygsenidse and Bombyeidse of N. America, i, p. 28, 

 t. 1, f. 14 (1872). 



Several examples taken along Weeminuche Creek to the Rio Piedro and between 

 Upper Rio Piedro and Rio Nutrias July 28. 



This species is rare in collections. It is nearly the size and color of the Eastern C. 

 Virginica Charp., but has the pale yellow marks or lines on teguheand primaries like 

 C. Venosa Wlk., excepting that the latter species has one more pale line on primaries 

 toward the apex. 



Ctenucha Sanguinaria, n. sp. 



Female expands not quite two inches; head bright blood-red or scarlet, shining 

 blue between the eyes; prothorax above same lustrous blue, beneath and at sides 



