_o — 



from that typical of one form, to that typical of another.* Mr. Smith added that 

 these variations were largely selected from material obtained by him, and there 

 were some interesting Tacts as to the localities from which those specimen came. 

 In Cambridge he collected several hundreds of C. scalaris, all perfectly alike In 

 the pineries of New Jersey he collected 0. philadelphica, slightly variable hut with 

 no particular tendency toward scalaria. In Cape Cod both species were found, 

 and both somewhat variable, showing a tendency to an obliteration of tie- Lines 

 of demarcation between species Specimens from the Adirondack^ further close 

 the gap, while material received from Canada showed a surprising range of vari- 

 ation ami furnished most of the interesting forms completing the links between 

 the species. 'This was interesting because lie had found that in both Coleoptx ra 

 and Lepidoptera, species that elsewhere were constant enough showed a decided 

 tendency to variation in the same localities. The fauna of Northern New York 

 and Canada is one of extreme interest and deserves careful study. 



Mr. Waters exhibited a specimen of Anisota Hdligbrodtii together with the 

 cocoon from which it was obtained. Mr. Hulst remarked on this, that all the 

 other species of Anisota had naked pupae and were subterranean, while here was 

 a species apparently congeneric, which had a double cocoon like Oecroput, spun 

 on mesquit: not a solid cocoon, but net-like, so as to show the pupa. Mr. Doll 

 said that the geometrid Eucaterva variaria raised by him. spun a very similar co- 

 coon, also donbje. Mr. Hy. Edwards joined the meeting alter adjournment and 

 remarked on this subject that under some circumstances the species of I)(tl<im< 

 will spin a light cocoon among d-ebris, so also as to most of the other Bombycidw 

 that are usually subterranean. 



Entomological Society of Washington. April 2, 1885. -Mr. Schwarz ex- 

 hibited specimens of Rhopalopus sanguinicollis Horn and remarked that this 

 Cerambycid is one of the few species peculiar to the mountainous regions of the 

 Alleghanies. He contrasted this scarcity of peculiar mountainous species with 

 the rich montane and colli ne faun." of Europe, given as the reason of the differ- 

 ence, the long established cultivation of the soil in Europe by which the fauna 

 and flora of the plants have become differentiated from those of the less cultivat- 

 ed hills and the uncultivated mountains. 



Mr. Howard made a statement in regard to the parasites of T kyridopteryx 

 ephemerceformis. He had found the larva- of Hemiteles thyridopterigis being eaten 

 by a Chalcid larva, presumably that of the Pteromalus commonly bred from the 

 bags of the Tkyridopteryx. He generalized on the difficult distinction between 

 primary and secondary parasites. 



Dr. Marx read a paper on the Arachnida collected b\ Dr. Turner in North- 

 ern Labrador. The best presented families are tin Lycosoidce, the Drassoidcv 

 and Tomisoidce. 



May 0. —Mr. Schwarz exhibited newly hatched specimens of Epiccerus im 

 bricatus, still possessing the mandibular appendages. One specimen illustrated 

 the process of losing these appendages. They do not break off in one piece, but 

 the basal third remains attached to the mandibles and must be lost at a later 

 time. 



A discussion took place between Dr. Barnard and Messrs. Stewart, Schwarz 

 and Howard respecting the collection of Neuroptera. 



* The paper with plate illustrating the varieties will appear in an early 

 number. 



