SCUDDER ON FOSSIL INSECTS. 745 



the apical no larger tbau the others, and all apparently furnished (as 

 indicated at one point onl}') with a fringe of profuse, exceedingly deli- 

 cate hairs, as long as the joints. The body is slender and the wings 

 three times as long as broad; the costal vein runs only to the tip of the 

 wing, and the margin beyond it is very faint; the first longitudinal vein 

 runs uninterruptedly to the middle of the apical fourth of the wing; 

 the second longitudinal nearly to the tip; the third longitudinal vein 

 takes its rise from the second in the middle of the basal half of the 

 wing, and parts widely from the second, leaving an unusual space devoid 

 of neuration next the apex of the wing; the fourth arises from the third 

 rather abruptly a little beyond its base, and has close beneath it the rem- 

 nant of a vein or a fold in the wing; the next vein forks just beneath the 

 origin of the fourth longitudinal vein, and leaves beneath it, next the 

 posterior margin, a broad space without veins; the two basal cells are 

 very short, and there appear to be no other transverse veins in the whole 

 wing; all the veins are hirsute. The legs are long and slender, and 

 covered with spinous hairs arranged in exact longitudinal rows, giving 

 the legs a striped appearance under the microscope ; the femora are 

 rather short, and the tibia? and tarsi of very unequal length, excepting 

 on the hind legs; the tibi;e and all the joints of the tarsi are furnished 

 apically with small spurs. Length of bodyS'""'; antenna? 1'"'"; wings 

 2.r""^; fore femora 0.5(?)"""; middle femora 0.6™'"; hind femora 0.8™'" ; 

 fore tibi.T 0.8™"' ; middle tibiii? 0.9™™; hind tibiie 1.4™™ ; fore tarsi 1.8™™ ; 

 middle tarsi 2.3™™; hind tarsi 2.1™™. Chagrin Valley. 



An indeterminate species of this family, whose generic affinities cannot 

 be discovered, from the entire absence of neuration in the wings and the 

 loss of every other characteristic feature, presents a side view of the 

 body with fragments of legs. The insect is minute, measuring but 2.75™'" 

 long. It taay possibly belong to the Ceeidomi/icla: Chagrin Yalley. 



Another similar specimen, but distinct from the above, exhibits a 

 dorsal aspect, and little besides the trunk is left. The thorax is com. 

 paratively stout, the head nearly as broad as the thorax, and the abdo- 

 men very slender and equal. The body is 3.25™™ long. Chagrin Yalley. 



A third indeterminate species probably belongs to this group, but 

 the specimen is too indistinct to be of much value. It is a female. The 

 antenna' are a little longer than the head ; the head a little narrower 

 than the abdomen, the latter tapering to a point. The costa of one wing 

 is present, and the rather short and moderately stout legs of the oppo- 

 site side. Length of body 1.8™'" ; of middle femur 0.8'""' ; of same tibi;c 

 0.5™'". Fossil Canon. 



Family Cecidomyid.i:. 



Lasioptera recesm. — A single specimen of a minute tly, with the an- 

 tenna* perfect, the body preserved on a side view, with parts of the 

 legs and the wings folded together over the back, raised from the body. 

 The head is moderately large, and appears to be a little narrower than 



