BEUTENMULLER, MONOGRAPH OF THE SESIID^E. 301 



Sesia rubristigma (Keltic oil). 



Plate XXXI, Fig. ii, Male. 



sEgeria rubristigma Kellicott, Can. Ent. Vol. XXIV, 1892, p. 211 ; Insect Life, Vol. V, 1892, 

 p. 84 ; Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VI, 1894, p. 94. 



Sesia rubristigma Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VIII, 1896, p. 141 ; ibid. Vol. 

 IX, 1897, p. 220. 



Male.— Head blue black, orbits pure white, palpi with basal joints black, second joint black 

 except the tip, which is yellow, as is the whole of the third joint. Antennae black. Collar yellow. 

 Thorax black with a yellow mark posteriorly and a yellow patch on each side below. Abdomen 

 black with a narrow yellow band on the second and last segments, and a broad one on the fourth 

 segment encircling the body ; first segment with a spot on each side. Anal tuft black with a nar- 

 row yellow line on each side. Legs blue black, varied as follows : anterior coxse, fore tibiae, all the 

 tarsi, the spurs, and a band at the middle and apex of the hind tibiae, yellow ; the tarsi, however, 

 have some dark scales, appearing faintly banded. Forewings transparent, purple black, borders 

 very narrow. Discal mark square, bright red. Underside with borders yellow to the discal mark, 

 which is the same as above. Hind wings transparent, borders very narrow, purplish, costa orange 

 red ; underside similar to the upper. 



Female.— Similar to the male. The outer margin of fore wings much broader, with red scales 

 between the veins. Anal tuft with a distinct yellow lateral line. 

 Expanse : Male and female, 16-18 mm. 

 Habitat. — Ohio, Iowa, New York. 

 Type : One male. Coll. Am. Mus. Nat. Hist. 



Allied to the preceding species, from which it differs in having the margins of 

 the fore wings black and much narrower, and the transverse mark brilliant red. 

 The larva lives in the galls of Andricus cornigerus, on oak (Quercus palustris)> 

 and the moths appear in June and July. 



Sesia querci (Hy. Edw.). 



Plate XXXI, Fig. 15, Male. 



Algeria querci Hy. Edwards, Papilio, Vol. II, 1882, p. 98. 



Algeria quercus Hy. Edwards, Ent. Amer. Vol. Ill, 1888, p. 224 ; Beutenmuller, Bull. Am. Mus. 



Nat. Hist. Vol. IV, 1892, p. 172. 

 Sesia querci Packard, 5th Rep. U. S. Ent. Com. 1890, p. 217 ; Beutenmuller, Bull. Am. Mus. 



Nat. Hist. Vol. VIII, 1896, p. 141 ; ibid. Vol. IX, 1897, p. 220. 



Male. — Head black, palpi black, white inside and at the tip ; collar yellow, antennae black, 

 clavate. Thorax black, patagia with a few yellow scales at the tip ; posterior part with a small 

 yellow spot ; underside with a yellow patch on each side. Abdomen deep black with a very narrow 

 yellow band on the second and third segments ; a very broad one on the fourth extending around 

 the body, and a very narrow one on each of the last two segments. Anal tuft black broadly edged with 

 yellow above. Legs black, tufts and spurs white, anterior coxae with a yellow line. Fore wings 

 transparent with very narrow golden brown margin. Discal mark straight, narrow, pale yellow ; 

 underside of wings with margins and discal mark pale yellow. Hind wings transparent with very 

 narrow purplish brown margin, costa pale yellow ; underside same as the upper. 



Female. — Larger than the male. Anal tuft black on each side, pale yellow in the middle. 

 Otherwise similar to the male. 



