HAG£x.] ZOOLOGY PSEUDO-NEUROPTERA AND NEUROPTERA. 589 



appendages reddish, cylindrical, the apex acute, black, recurved be- 

 neath, in the middle with a stout triangular tooth, with the apical side 

 straight, the basal side oblique, with 6 small teeth ; inferior appendage 

 shorter, ending just after the tooth of the superiors, triangular, buttbe 

 apical half of equal breadth ; the tip a little excised, nearly bifid ; gen- 

 ital parts of the second segment with the hamules long, bent at the 

 base, straight, rounded externally, the apex bifid ; the external branch 

 stout, triangularly-pointed ; the internal of equal length, slender, ungui- 

 culated ; anterior lamina excised ; sheath of the penis orbicular, with a 

 longitudinal impressed furrow; apical lobe of the second segment small, 

 triangularly-pointed ; feet black, all trochanters and the anterior femora 

 beneath* reddish-yellow ; wings hyaline, the extreme base flavescent, 

 membranula whitish, a little cinereous on the margin ; veins reddish, the 

 costa and some transversals near the base yellowish ; pterostigma 

 oblong, yellow, darker in the middle; 7 antecubitals ; 7 postcubitals ; 

 3 discoidal areolets. 



Female similar to the male, paler, coloring more luteous ; the 

 lateral black bands of the abdomen more enlarged to the tip, no yellow 

 dorsal spots ; appendages yellow, slender, cylindrical, the apex acute,; 

 vulvar lamina triangular, bifid, the two branches pointed at tip and a 

 little divergent ; the femora of the anterior and intermediate feet yel- 

 lowish beneath. 



Length of the body, ^, 34 millimeters; 9, 32 millimeters: alar 

 expansion, $ , 52 millimeters ; 9 , 53 millimeters ; pterostigma 2 milli- 

 meters. 



Habitat. — Foot-hills, Colorado ; Colorado Mountains, Pacific slope, 

 August 15 to September 6 (Lieutenant Carpenter), several pairs. The 

 species is very similar to D. vicina, but differing in the black feet and 

 the genital parts of both sexes. Some fragments of the male from the 

 Yellowstone are a little larger, but probably the same species. 



D. palU^es, sp. nov. 



Male. — Yery similar to 1). decisa, but larger in size and paler in color, 

 difl'ersin the following characters : no transverse, black band before the 

 eyes; vertex yellow in the middle, brownish on each side ; the color of 

 the dorsum of the thorax apparently changed by the alcohol, paler 

 (perhaps greenish), with a triangular, brownish band in the middle, and 

 on each side an ill-defined brownish line, not reaching the sinus ; sides 

 of the thorax red in the superior half, some ill-defined paler spots above 

 the legs. Abdomen more slender, sutures brown ; no black dorsal or 

 ventral bands, except a dorsal brownish mark on the third and base of 

 the second segment; however, these marks could be produced by the 

 decaying process ; on the third and fourth segment an indication of two 

 yellow spots before the apex ; venter pale ; appendages similar, but the 

 inferior middle tooth of the superiors with the interior surface not 

 oblique, more perpendicular; the apex of the tooth yellow, with the 

 small tooth more pronounced and black ; genital parts similar, but the 

 external branch of the hamule excavated exteriorly and cut on the tip; 

 internal branch black ; the apical lobe of the second segment narrower, 

 more jointed. Feet more slender, reddish yellow, a fine black line out- 

 side of the femora, not reaching the base, and a finer and shorter one 

 on the tibia near the black spines ; joints of the tarsi black at the tip. 

 Wings similar, less flavescent at the base; 8-9 antecubitals; 7-8 post- 

 cubitals. 



Length of the body, 40 millimeters; alar expansion, Gl millimeters; 

 pterostigma, 2 millimeters. 



Habitat. — Foot-hills, Colorado (Lieutenant Carpenter). 



