638 abstracts: entomology 



GEOLOGY. — The Farnham anticline, Carbon County, Utah. Frank 

 R. Clark. U. S. Geol. Survey, Bull. 711-A. Pp. 13, pis. 2, fig. 

 I. 1919. 



The Farnham anticline is in the south-central part of Carbon County, 

 Utah. The surface strata involved in the anticline are the Mancos 

 shale, the Dakota sandstone, and the McElmo formation. 



The anticline is a small uplift in a broad, gently northward-dipping 

 monocline which was developed in the movement that produced the 

 San Rafael Swell and Uinta Basin folds. It is about 3 miles long by 

 three-quarters of a mile wide. The dip of the rocks affected by the 

 anticline rarely exceeds 10° except adjacent to faults, where it ranges 

 from 25 ° to 85 °. Several faults cut the surface strata of the anticline 

 and trend roughly parallel to the axis of the fold. 



The Farnham anticline is structurally favorable for the accumulation 

 of oil and gas, and the nearest exposures of Triassic and Pennsylvanian 

 rocks contain oil seeps. These conditions appear to warrant one or 

 more test holes of this fold, and locations for test holes are suggested. 

 This paper concludes with a review of oil and gas prospecting in Utah. 



R. W. Stone. 



GEOLOGY. — Oil shale in western Montana, southeastern Idaho, and 

 adjacent parts of Wyoming and Utah. D. Dale Condit. U. S. 

 Geol. Survey, Bull. 711-B. Pp. 26 (15-40), pi. i, figs. 2. 1919. 

 In the Dillon-Dell area, Montana, where the Phosphoria oil shale is 

 at its best, the richest beds of 3 feet or more in thickness yield 25 to 30 

 gallons of oil to the ton. The phosphate beds associated with the shale 

 are thinner and contain considerably less phosphorus pentoxide than 

 those mined near Montpelier, Idaho, and those known to occur in the 

 Melrose and Garrison fields of Montana. Samples of the shales asso- 

 ciated with the high-grade phosphate rock in the southeastern Idaho 

 area yielded on distillation little more than a trace of oil. 



R. W. Stone. 



ENTOMOLOGY. — The parasitic actdeata, a study in evolution. Wil- 

 liam Morton Wheeler. Proc. Amer. Phil. Soc. 58: 1-49. 

 1919. 



After summarizing the various types of parasitism in the hymen- 

 opterous insects known as Aculeata (excepting the Scoliids and Mutil- 

 lids), and presenting an interesting hypothesis as to how parasitism 

 arose, the author summarizes his conclusions as follows: 



