30 JOURNAL OP ECONOMIC ENTOMOLOGY [Vol. 1 



of certain shrubs and herbaceous plants, there usually being a number 

 of larvae in each gall. The botanical genera, SoUdago and Aster, 

 appear to be prime favorites with this group of insects. The willows, 

 Salix species, have a peculiar fauna, and it is worthy of note that, 

 so far as known to us, not a Lasiopterine has been reared from an 

 American Salix, though a species of Clinorhyncha was taken on this 

 plant. This is the more remarkable, as they occur abundantly in 

 subcortical galls on a number of shrubs and trees such as Samhucus, 

 Viburnum, Lindera, etc. The genus Salix appears to be a prime 

 favorite with Cecidomyiidge referable to Rhahdophaga or nearly allied 

 genera. These insects produce varied subcortical galls on stems and 

 branches, and are also responsible for several bud galls. The poplar, 

 Populus species, differs markedly from Salix in its Cecidomyiid fauna. 

 A European species of Lasioptera has been reared from this genus, 

 while in America we have obtained but one species of Rhabdophaga, 

 as contrasted with some ten or more bred from Salix. We have bred, 

 presumably from poplar, a representative of the aberrant genus OU- 

 garces. There are, in addition, a number of leaf galls occurring on 

 poplar, upon which we are not prepared to report. Many representa- 

 tives of the genus Dasyneura and its allies subsist in loose bud galls 

 or folded leaves such, for example, as Dasyneura leguminicola Lintn., 

 which breeds in clover heads, the European D. trifolii F. Lw. in the 

 folded leaves of clover, and D. pseudacacice Fitch in the folded leaves 

 of black locust. The larvae of Dasyneura flavotibialis Felt subsist in 

 fungous affected, rotting wood. Oligotropkus asplenifolia Felt was 

 reared from the folded leaves of sweet fern, Comptonia asplenifolia, 

 while several species of Rhopalomyia occur in large numbers in com- 

 pound terminal heads of SoUdago. Certain species of Hormomyia 

 breed in some of the well known hickory leaf galls, while the larva of 

 H. crataegifolia lives in a leaf fold on Crataegus. Some European 

 species of this genus have been reared from galls in grass stems, and 

 undoubtedly certain of our American forms have similar habits. 

 Many members of the Diplosid group occur in folded leaves, loose 

 tip galls or even in more or less abnormal florets. 



Some of the incident perplexities of this work are illustrated by 

 our having reared four species of Diplosids from florets of the spread- 

 ing Dogbane, Apocynum androsaemifolium. A rather irregular, 

 loose leaf fold gall on the base of hazel leaves may produce three or 

 four species, while we have obtained two distinct forms from the 

 rather well known tumid leaf gall on grape, ascribed to Lasioptera 

 vitis 0. S. There is, in addition, a petiole gall on grape which has 

 produced three forms referable to as many genera, while the common 

 horseweed, Erigeron, normally produces two entirely different species. 



