586 GEOLOGICAL SUKVEY OF THE TEEEITORIES. 



den expedition of 1871, taken at Ogden, Utah, the only one known to 

 liave been found west of the Eocky Mountains. The species is very com- 

 mon in all States east of the Mississippi and in Northern Texas. The 

 southern limit seems to be Mississippi and Georgia. 



Tj. saturata, Hagen, Synop., 152, 4 {jgartim) ; Uhler, Proc. Acad. 'Ent. 



Sci., Phila., 1857, 88, 4. 



Stout, reddish-yellow, subvillous ; vertical vesicle narrower at the tip, 

 the sides not emarginated ; abdomen broad, narrower at the tip ; geni- 

 tal parts in the second segment, with the hooks excavated transversely 

 on the tip, both ends equally pointed, the interior end black. Body of 

 the female brownish ; sutures of the abdomen black ; vulvar lamina 

 widely emarginated ; feet reddish-yellow, viilose ; wings of the male 

 hyaline, the anterior margin and the basal half yellowish rufous ; basal 

 space and triangle fuscous, the second costal space of the nodus sub- 

 fuscous ; veins reddish, the transversals in the first and second costal 

 space bright-yellow ; wings of the female hyaline, the costal margin, 

 the basal space, and the triangle colored as in the male ; pterostigma 

 narrow, long, fulvous ; membranula black ; 24 antecubitals, 15 post- 

 cubitals, 5 discoidal areolets j 3 to 4 veins in the triangle. 



Length of the body, 55 millimeters j alar expansion, 90 millimeters ; 

 pterostigma, 5 millimeters. 



Habitat. — Yellowstone (Professor Hayden's expedition), males and 

 females ; Arizona, August 5. This species was first described by Mr. 

 Uhler after a single mutilated individual from the San Diego trip by Dr. 

 T. H. Webb, perhaps not from California. At the time when I published 

 my Synopsis, I knew only a male from the Berlin Museum, from Mexico, 

 and a male and female communicated by Mr. Saussure, collected at 

 Tampico or Cordova, Mexico. The latter pair belongs, as I now per- 

 ceive, to L. croceipennis. As both species are very similar, I give the 

 differences of the latter. 



L. croceipennis, De Selys, Ann. Soc. Belg., 17 ; Bull., 67, 1. — Lib. sa- 

 titrata, Hag., Syn. 152, 4 {partim). 



"Very near and similar in colors to L. saturata, but a little smaller in 

 size ; the base of the wings in the male less colored ; the basal space and 

 triangle not fuscous 5 the veins in the two costal spaces reddish ; second 

 hooks in the male with the interior ijointed end much longer, black ; 

 apical inferior lobe of the second segment of the abdomen larger. These 

 differences are taken by comparing the male from California, described 

 in the Synopsis as L. saturata, with De Selys's description, and the males 

 of L. saturata from Yellowstone. The following statements are manu- 

 script notes on the specimens, communicated by Mr. Saussure. 



The male from Tampico has only the alar expansion 80 millimeters ; 

 the head in front and the feet darker; the wings less yellowish, the 

 yellow color on the costal margin not reaching the nodus, going hardly 

 beyond the triangle, which is not darker than the rest. The female 

 from Cordova is a j'oung one, paler mesothoracic crest yellow, a yellow 

 band between the wings ; appendages yellow ; the eighth segment later- 

 ally dilated; vulvar lamina short, elevated, deeply emarginated, thick- 

 ened on the sides ; wings hyaline, costal margin to the principal sector 

 and triangle yellowish. 



EaMtat. — Cape San Lucas, Lower California, by Xanthus de Vesey ; 

 Tampico, Cordova, Mexico, Mr. Saussure. After De Selys's Orizaba, 

 Vera Cruz, Mexico, Guatemala, and jierhaps Colombia. 



I have no doubt about the identity of the male in my collection with 



