CHAMBERS ON TINEINA OF COLORADO. 137 



viscosa among the foot-hills about Edgerton. It makes a fusiform 

 swelling in the stalk near the ground. I did not succeed in rearing 

 the species. Four other species (L. albella, L. albapalpella, L. guinella, 

 and L. grandisella) have also been described by me from Colorado in 

 Cin. Quar. Jour. Sci. (Joe. cit. sup.). 



EripMa concolorella, Cham. (Can. Eut., vol. vii, p. 55). — Formerly de- 

 scribed from Texas. A single specimen much injured, but which 1 be- 

 lieve belongs to this species, was taken at Edgerton, Colorado, in July. 



Tischcria. — Mines of two species of this genus belonging no doubt to 

 species already well known in the Mississippi Valley were found in scrub- 

 oak leaves near Colorado Springs. 



Lithocolletis amorphceella n. sp.'? or var. '? audi, amphicarpeoeella sp.? or 

 var. ? — These belong to the robiniella group, and entomologists will con- 

 sider them species or varieties according to their ideas of what consti- 

 tutes species. I have discussed this question elsewhere as to the spec- 

 imens from Robinia, Amphicarpecea, and Asmodium, and Dr. Clemens 

 noted some of the differences between the species from Robinia and Am- 

 pMcarpeoca, but did not consider the latter distinct from the former, and 

 did not name it. As it seems to be an unsettled question whether they 

 are distinct species or only what Mr. B. D. Walsh called " phytophagic 

 varieties", it is, I think, best, or, at least, most convenient, to give them 

 distinct names. Another allied species has been described, from Texas, 

 by Prof. Zeller, as L. texana. It resembles amoyplavella except that the 

 latter has no white basal streak on the fold, has the first costal streak 

 less oblique, has a minute silvery dorsal spot opposite to the last costal 

 spot, and has a distinct apical blackish spot smaller than it usually is 

 in robiniella. It (amorpluvella) is smaller than robiniella, with the ground- 

 color of the wings paler, and the dark color of the dorsal margin ceases 

 abruptly just before the fascia. Its mine, like that of robiniella and all 

 the others of the group, is white, but it is much smaller. The difference 

 in width between the wings of robiniella and texana, as figured by Zeller, 

 seems to me to be greater than that between robiniella and amorphceella. 

 Indeed, Zeller's figure seems to me to represent the wing of robiniella a 

 trilie too wide in proportion to its own length, and the first costal and 

 second dorsal streaks are too distinct. In several specimens of robini- 

 ella (bred) now before me, the first dorsal is short, passes gradually into 

 a silvery-gray streak, which is very oblique, and which, crossing the 

 fold, unites with the second costal streak, forming a strongly-angulated 

 fascia, which is produced (of the silvery-gray hue) a short distance back 

 along the disk. This silver- gray streak is, it is true, not a clear white, 

 like the streaks which it unites, yet it is of a different color from the 

 surrounding portion of the wing, and in some lights glistens with a sil- 

 very-white luster. It is not represented in Zeller's figure, and that fig- 

 ure also represents the apical spot as a little larger and more indistinct 

 than it is in my specimens ; but, as I have elsewhere stated, it varies both 



