168 



Yellow Scale parasite, Coccophagns citrimoi Craw, that it unquestiona- 

 bly belongs to the genus Mncarsia rather than to Coccophagns and that 

 the drawing is misleading, especially in the details of the thorax. 



American Spiders.— We are greatly pleased to learn that Count Key- 

 serling's magnificent work " Die Spinnen Amerikas " has not been 

 interrupted by the lamented death of the author. The publishers, 

 Messrs. Bauer & Kasjie, of Nurnberg, after Count Keyserling's death 

 in April, 1880, turned over his manuscripts to Dr. Marx, of this Depart- 

 ment, whose name appears as editor of Part iii. This part includes a 

 consideration of Brazilian spiders, and treats of 240 species of 70 genera 

 and 14 families. Vol. iv is now in course of prei)aration by Dr. Marx. 

 It will take up the Epeiridai of North, Central, and South Amer- 

 ica. For this volume Keyserling left descriptions and illustrations 

 of over 200 species. Vol. i of the work was published in 1880, and 

 treated of the Laterigradie, and Vol. ii upon the Theridiidse appeared 

 in two parts in 1884 and 1885. 



WHEAT AND GRASS SAW-FLIES. 



By C. V. Riley and C. L. Marlatt. 



For a number of years jiast notes on certain Saw-flies, the larvae of 

 which feed on wheat and various meadow grasses have been accumu- 

 lating in the Division. A short note on a Saw-fly larva, which attacked 

 wheat, was published in Bulletin No. 4 of this Division. The adult, 

 however, of this species was not obtained and little was discovered of 

 its habits and life-history except the fact mentioned of its feeding ou 

 wheat. A further reference to wheat Saw-flies occurs in the Eei)ort of 

 the Entomologist for 1884, in which an account is given of the habits of 

 certain Tenthredinid larvae which were found to infest wheat near Bloom - 

 iugton. 111., and afterwards at Oxford, Ind. The descriptions of two 

 forms of larvae are there given, but no adults were reared and the species 

 were not determined. Since that time the habits and life-history of a 

 number of species have been somewhat fully traced, while some addi- 

 tional larva?, of which no adults have yet been obtained have been 

 studied. In view of the fact that little, if anything, is known of the work 

 of these insects and that they are liable at any time to assume impor- 

 tance, we deem it advisable to put on record the facts already obtained. 



The European Corn Saw-fly [Geplms pygmceus) has lately been found 

 in injurious numbers in several localities, and is treated of at length 

 by Prof. Comstock in Bulletin No. 11, of the Cornell Experiment Sta- 

 tion, and an article is published upon it in Vol. ii of Insect Life, 

 page 28G. The larva of a Ceplius sp. has been found by Mr. Koebele, 



