88 PROCEEDINGS OF THE ACADEMY OP 



5 . Fuscous : head, with the frontal vesicles above, labium and spots upon 

 the occiput yellow, antennae and connecting line black, eyes brown : pleura 

 with two oblique yellow lines bounding inferiorly a trigonal pale spot, a pale 

 transverse line between the pairs of wings : wings hyaline, at the base a 

 longitudinal line, a spot upon the anterior middle, and another upon the apex, 

 brown, nervules of the spots and intervening surface yellow, pterostigma black : 

 legs pale at base, black upon the tip of the femora and tibiae : abdomen brown- 

 ish, a little depressed, antepenultimate segment a little dilated, a dark line upon 

 the middle, and one each side bright yellow, venter lined with yellow each 

 side, cerci short, subfusiform, acute, inferior appendage same length as cerci. 



5 . Differs but little from the 9 in size and coloring ; it may be distinguish- 

 ed from L. pulchella, Drury, — to which it is very closely allied — in the lateral 

 yellow vitta and much larger size of the § : the male always wants the plum- 

 beous abdomen, which is common to L. pulchella. 



4. L. s a t u r a t a. Reddish yellow ; head ; thorax dark yellowish-red, pale 



beneath and upon the sides ; wings humeral portion saturate reddish-yellow, 

 cubital portion hyaline, nervules red, pterostigma red, margined anteriorly and 

 posteriorly by a black nervule ; legs rufous, pale at base, tibial spines black ; 

 abdomen slightly dilated, carinate, trigonate, lateral edge and denticles black ; 

 cerci subfusiform, acuminate, armed with a row of minute tubercles upon the 

 inferior surface, inferior caudal appendage oval, tapering at tip and emarginate. 



Length 2 inches. San Diego trip. Dr. T. H. Webb. 



This species is indicated by a mutilated individual only; the head and a great 

 part of the wings and legs are gone, and those parts remaining are in so bad a 

 condition as to render it almost uncharacterizable. It apparently belongs to a 

 group having five rows of discoidal areolets ; the triangle is crossed by four 

 nervules. 



5. L. J u 11 a. Fuscous, pubescent; eyes brown, darker below, tips of mandi- 

 bles, line between the antenntB, antennae and pubescence upon the front black, 

 front and occipital spots yellowish ; thorax with the superior, middle-surface and 

 pleura pale fuscous, humerus with a dark-brown longitudinal line; wings hyaline, 

 posterior pair with a trigonal dark-brown spot at base of each, necks of anterior 

 pair tinged with brown, nervules and pterostigma dark-brown, the latter narrow 

 and a little elongated, membranes narrow whitish ; legs with the coxae, tro- 

 chanters and bases of femorae pale reddish-yellow, tibiae and tarsi blackish ; 

 abdomen sub-depressed, slightly carinate above, line upon the middle of the 

 posterior segments and lateral margin black, caudal appendages yellow, cerci 

 short, subfusiform, minutely, serially, granulate beneath. 



Length 1^ inches. Fort Steilacoom, W. Territory. Dr. Suckley. 

 A species very closely allied to L. trimaculata De Geer. It possesses three 

 ranges of discoidal areolets, and the triangle is crossed by only one nervule. 



6. L. as s i m i 1 a ta. Pale-yellow ; head yellowish-testaceous, a black line cov- 

 ering the antennal suture, tips of mandibles and antennae black, front and vertex 

 closely covered with blackish hair ; thorax densely pubescent, pectus pale-tes- 

 taceous ; wings hyaline, tinted with yellow upon the base and humeral margin, 

 costal nervule dotted with minute, black points, pterostigma yellow, margined 

 anteriorly and posteriorly, by a black nervule ; legs black, coxa;, trochanters 

 and inferior surface of the anterior legs, yellowish ; abdomen, almost transpa- 

 rent, yellowish, cerci . 



Length 1^ inches. Fort Union, Nebraska. Dr. Suckley 



The three individuals, the only ones that I have had the opportunity of ex- 

 amining, are in such a mutilated condition as to render it very difficult to 

 characterize them properly ; enough, however, remains to indicate their distinct- 

 ness from all the other species that have yet been noticed. 



They liave three ranges of discoidal areolets to the primary wings, and the 

 triangle is crossed by a single nervule. 



The three foregoing insects were kindly placed in my hands by Dr. Chas. 

 GLrard, to whom I would embrace this opportunity of returning my thanks. 



[March 



