CHITTENDEN: SPECIES OF PHYLLOTRETA 389 



silicates. Magnesium may have been separated from solution 

 by this process. 



Only one other analysis of a brine from a depth comparable to 

 that from which this brine was obtained has been made, as far 

 as is known. It was made by George Steiger^ and represents a 

 brine that is similar in chemical composition to the one reported 

 here. The principal points of dissimilitude are that Steiger 

 reported no silica, aluminum, or manganese, and only a trace of 

 barium, all of which were obtained in small quantities in this 

 analysis; he found bromide to be predominant over iodide, while 

 in this brine iodide occurs to the exclusion of bromide; and he 

 determined the total solids to be 263.64 grams in 1,000 grams. 



ENTOMOLOGY.— A new species of PhyllotretaA F. H. Chit- 

 tenden, Bureau of Entomology. (Communicated by L. O. 

 Howard.) 

 In studying the injurious genus Phyllotreta accumulated in 

 the U. S. National Museum and Bureau of Entomology, a species 

 is found which is new to science. Like others of the genus, it 

 attacks and undoubtedly breeds on cruciferous plants and is at 

 least a potential pest. The description follows: 



Phyllotreta utana Chittenden, sp. nov. 



Elongate oval, moderately convex, shining black except last ventral 

 segment which is opaque ; thorax and elytra variably black or aeneous ; 

 elytral vittae very narrow, pale yellowish. An- 

 tennae less than half as long as body, joints 2 

 to 5 usually honey yellow, i and 6 either black 

 or partly pale, remainder piceous. Each elytron 

 with a very narrow v-tta, moderately sinuate, 

 curvature scarcely reaching beyond middle of 

 elytron either at base or apex; each vitta with 

 a short broad post-humeral branch. Tibiae 

 piceous, tarsi fuscous. 



Male: Last ventral segment large, concave, 

 nearly as long as segments 2-4 combined, mod- 

 erately impressed at apex with a short median 

 impressed line at base. Antennal joints 2-3-4 Fig- 1.— Phyllotreta utana 



® Clarke, F. W. Water analyses from the laboratory of the United States Geolog- 

 ical Survey. U. S. Geol. Survey Water-Supply Paper 364: 9. 1914. 

 ^ Received June 8, 1920. 



