24 AMERICAN NEUROPTERA. 



DIL.AR Eambr. 



Antennae of male pectinate ; female with an ovipositoi-, commonly 

 as long as body ; vertex of head with three tubercles resembling 

 ocelli. Wings entire ; four or more radial sectors ; subcosta ends 

 in margin ; no recurrent vein ; gradate veins irregular. 



Type. — D. nevadensis Rbr. 



I have never taken our one species, which does not appear to have 

 been collected since its descripiion. 



Dilar aniericiiiiiis McLachlan. — "Body whitish, with a faint yellowish 

 tinge, clothed with whitish hairs, with which a few black hairs are intermingled. 

 Face yellowish. Eyes metallic-silvery. On the head above are three very large, 

 somewhat closed placed, rounded-oval tubercles. Antennje concolorous with the 

 body, ai)parently 17-jointed, the joints short, somewhat nioniliform, not toothed 

 internally at the apex, the terminal joint ovate. Legs whitish, with white hairs; 

 the tips of the femora, tibife and tarsi testaceous; claws minute, simple, piceous. 

 Apex of the abdomen forming an elongate pyriform opening, in the middle of 

 which are two large rounded, whitish, finely granulose tubercles (extraneous 

 bodies ?) ; ovipositor longer than the entire body in the dry insect, yellowish 

 white, semi-transparent, slender, slightly curved. Wings pale whitish hyaline, 

 each with about twenty rather large greyish spots, some of which, in the apical 

 half of the wing, show a tendency to unite into fascise; neuration pale, darker 

 in the spots, hairs long, whitish, but mixed with blackish, especially on the spots; 

 subcostal area almost without tiansverse nervules; costal veinlets simple, with 

 faint indications of marginal rudiments between them ; principal sector with five 

 branches in both pairs; transverse nervules very few, so that the neuration is 

 remarkably open ; a discal horny point between the first and second branches of 

 the sector; nearly all the apical and marginal nervures, bifurcate or tri furcate, 

 with minute marginal rudiments; 



Female. — Length of body (without ovipositor) about 3 mm; length of oviposi- 

 tor about 33 mm. Expanse of wings about 14 mm." 



Described from "one female example (not in very good condition) 

 taken by Mr. Sanborn at Bee Spring, Kentucky, in June, 1874." 



McLachlau says that with the South American species this may 

 form a separate genus on account of more open venation, and one 

 (^many branclied) sector to the radius ; in the European species there 

 is a simple sector arising before the branched one. 



I have seen the type in the Museum of Comparative Zoology at 

 Cambridge. The radial sector has five forks, and is connected back 

 to radius three or four times: the median vein is simple until near 

 the tip of wing where it is forked ; the upper cubitus forks at mid- 

 dle and is connected to median twice; the lower branch of cubitus 

 and the anal vein have several branches running into the posterior 

 margin. 



