1887] Entomology. 853 
Bt llaneous.—Fremy* has succeeded in obtaining small 
__well-colored crystals of ruby by subjecting to a red heat a mix- 
ture of alumina and minium, and also by heating to a high 
temperature equal weights of alumina and barium fluoride. In 
both cases the color was produced by the addition of small 
quantities of potassium bi-chromate. Measurable crystals of 
quartz have been produced? by heating an enclosed dialysed so- 
lution of silica to a temperature of 320°. The crystals, 1⁄4 mm. 
in length, possessed the forms R, —R, «R, and in two cases 
j ce Tridymite was obtained by fusing pieces of very acid rocks 
with the powder of basalts and melaphyres. A concretion of 
coarse tourmaline pegmatite in the tourmaline granite near 
Pisek, Bohemia, contains pseudomorphs? of pyrite after tourma- 
line. e rare mineral langite has been found by Von Foul- 
lon‘ forming the cement of a breccia in Pockwerke, Garnstein. 
ENTOMOLOGY. 
bservations on the Female Form of Phengodes laticollis 
-—Entomologists will remember the interest 
, about one year ago, in the discovery that 
female form of a Lampyrid® (Zarhipis riverst) ° 
Was larva-like, and that the three stages—larva, 
pe and adult—differed but little. On the night 
= tember 27, 1886, a larviform, luminous 
tle was collected on one of the walks of the 
ampus of the University of North Carolina. 
nce—in the spri 
My Possession, this must represent its pupa state. 
Seen path when crawling, two and 
Patten = s inches; width, three-eighths inch. 
telve ed, larviform, luminous ; composed of 
gently eetas (exclusive of the head), tapering 
ánterio ind, and more decidedly on the three 
< Segments, Chitinous plates on dorsum 
th . lOWn, the second to eleventh inclusive 
a pair of | ae 
Plate light pile light-brown, oval spots 
Wi Fic, 1.— hengo- 
„Plackish-brown spots. Below each stig- 2 /a#collis, show- 
i Pa the fourth to eleventh segments inclu- See 
| two longitudinal folds, the anterior half of each fold 
» Civ., 1887, p. 737. 
+E. Dee Neues Jahrb. f. Min., etc., 1887, i. p. 205. 
This den C k. k. geol. Reichs., 14, p. 350. 4 Ib,, 1886, p. 464- 
-Y to ct is edited by Prof. J. H. Comstock, Cornell University, Ithaca, - 
N Nat. x fommunications, books for notice, ete., should be 
XX, 648. See also Ent. Am., iii, 203. 
