HAGEN.] ZOOLOGY ^PSEUDO-NEUROPTERA AND NEUROPTERA. 585 



bands; abdomen similar but not pruinose; wings similar, basal bands 

 rudimentary, covering only the extreme base; 13 antecubitals, 9 post- 

 cubitals. 



Length of the body, ^ ,4,7 millimeters ; 9 , 46 millimeters ; abdomen, 

 (?, 30 millimeters; 9, 28 millimeters; alar expansion, S, 80 milli- 

 meters; $, 76-78 millimeters; appendages, c?, 2; pterostigma, 4 milli- 

 meters. 



Habitat. — Mexico, the colder region, by Mr. Saussure, a teneral male 

 described in my Synopsis ; an adult couple and a teneral female from 

 Yellowstone, Hayden's expedition, 1872. 



L.forensis, Hagen, Synop,, 154, 9. 



This species was first described after a male from California in the Ber- 

 lin Museum. Now I have before me a pair from the Yellowstone, and a 

 number of specimens from Victoria, Vancouver Island. This species is 

 similar to L. nodisticta, but surely different. 



In the adult male, the head is entirely black with the labrum ; only 

 the extreme lateral border of the labium, and an indication of tbe 

 lateral spot of the front, yellowish ; the thorax is much more villous, 

 the fine hairs longer and more dense ; the dorsum of the thorax pru- 

 inose, but a large, dark-browm band covered with brown hairs on the 

 humeral suture; the sides brown beneath, two elongate yellow spots in 

 tbe middle, and the part above them pale and covered with long fur- 

 like white hairs, interrupted on th6 second suture by the brown color 

 expanding upward ; abdomen similar to L. nocUsticta, pruinose, the yel- 

 low lateral spots on the dorsum more elongated, visible to the eiglith 

 segment ; appendages similar, but the inferior more pointed ; genital 

 l^arts similar, but the anterior lamina forming an ovoid lobe, faintly 

 notched on the tip ; feet black ; wings analogous, but more intensely 

 colored ; the basal band larger, exceeding the triangle ; a large trans- 

 versal black band beginning on the nodus and tapering to the hind 

 margin, indented in the middle ; the space between the bands and the 

 pterostigma below^ the nodus largely milky white, but this color not 

 reaching the apical or hind margin ; 10 antecubitals ; postcubitals. 



Female adult. — Similar to the male; head paler in front, rhinarium, 

 epistouia, brown ; front above with two large, quadrangular, yellow spots, 

 separated b3' the black middle furrow ; abdomen pruinose, similar ; vul- 

 var lamina larger, opened in the middle ; wings alike, the brown bands 

 more or less developed. 



One younger female from British Columbia has the thorax and abdo- 

 men not pruinose, dark-brown ; the wiugs without milky-white tinge. 



Length of the body, (?, 51-44 millimeters; 9 , 48^44 millimeters ; ab- 

 domen, (?, 34-28 millimeters ; 9 , 32-27 millimeters ; alar expansion, ^, 

 32-74 millimeters ; 9 , 82-72 millimeters ; appendages, 5,2; pteros- 

 tigma, 4. 



Habitat. — California, Berlin Museum ; Victoria, Vancourver's Island, 

 July, Mr. Crotch ; British Columbia, Mr. Crotch ; Yellowstone, Hayden's 

 expedition, 1871. The latter ones have the smallest dimensions. 



L.forensis imitates strongly L.pidchella, a species widely spread and 

 very common everywhere east of the liocky Mountains ; the dark- 

 brown tinge of the tip of all the wings in L. pulcliella, the smaller size, 

 and other differences, easily separate the two species. 



A very similar case of imitation is afforded by the two known species 

 of Plathemis, but P. trinaculata inhabits only the vast tracts of land 

 east of the Kocky Mountains ; P. subornata, west of them. 



L. pulchella, Hagen, Synop., 153, 8. 



Of this well-known species, one male is in the collection of the Hay- 



