NEUBOPTEBA TBICHOPTEBA PHBYGANID..E. 11)5 



.'! :'. .it tlu-ir posterior end, the thickness of the walls being- about l~t mm . 



A.> will be seen by these measurements, the cases are a little larger at their 



i itli. but otherwise they are cylindrical, taper with perfect regularity, and 



are straight, not slightly curved, as in many phryganid cases. They are 

 completely covered with minute, rounded, water-worn pebbles, apparently 

 of quartz, generally subspherical or ovate, and varying from one-third to 

 two-thirds of a millimeter in mean diameter; they thus give the cases a 

 granulated appearance. Nearly all the cases are filled with calcareous 

 material, but some are empty for a short distance from their mouth, and in 

 one case the inner lining of this part of the case has a coating of minuter 

 calcareous particles, evidently deposited therein after the case was vacated. 

 As the present thickness of the walls indicates (as also the size of the attached 

 pebbles), the silken interior lining of the case must have been very stout. 

 This follows also from the appearance of one or two which have been 

 crushed, for they have yielded along longitudinal lines, indicating a parch- 

 ment-like rigidity in the entire shell. In one of the specimens the outer 

 coating of heavier pebbles has in some way been removed by weather- 

 ing, and has left a scabrous surface, apparently produced by minute, hard 

 grains entangled in the fibrous meshes of the web ; it still, however, retains 

 its cylindrical form. 



The size of the case, its form, and the material from which it is con- 

 structed seem to indicate that it belonged to some genus of Limnophilida- 

 near Anabolia. 



Horse Creek, Wyoming. I h\ A. C. Peale. 



Subfamily PHK Y < 1 A \" I I >.!: Stephens. 



This subfamily of caddis-flies, comprising the larger species, is found 

 only in the northern portions of the globe, and is numerous neither in species 

 nor in neiiera; nevertheless it is the only group of caddis-flics whose remains 

 have hitherto been found in rocky strata, if we except the larval cases, of 

 which there is likely to be more or less question. And it is not a little 

 strange th.it thev have been found in several distinct places, ranging from 

 Aix in the OligOCene to I'ar.M-hlug in the upper Miocene. Mombach, the 

 l-le ..I' \\ i-_:lit, and Atanaterdluk, in Greenland, have also furnished species. 

 I'Voin amber .il-n three speeies are known, and now we have three more 

 species including ;i in-w -.-tienr form, to add from the strata of Colorado 



