T^he Ohio ^ACaturalist, 



PUBLISHED BY 



The Biological Club of the Ohio Stale Uni<versily. 



Volume IV. JANUARY. 1904. No. 3. 



Note.— Titles on pages 49 to 62 inclusive, are Papers and Abstracts given at the Annual 



Meeting of the Ohio State Academy of Science for 1903. Not all titles appear in table of 

 contents. Each author appears once. 



TABLE OF CONTENTS 



BURGE-ss— Notes on Introduction of Asiatic Ladybird (Chilocorits similis) in Ohio 49 



Rice— Preliminary Report on the Development of the Gill in Mytilus. (.Abstract.) 51 



Mead— Comparative Chart of the Vertebrate Skul! 52. 



Claassen— On the Occurrence of Fossombronia eristula in Ohio 58- 



KELLER.MAN and Jennings- Report for 1902 on the State Herbarium, including 



Additions to the State Plant List 59- 



Westg ate— Shore Line Topography Between Toledo and Huron, (Jliio 61 



"\V.\i,T0N — The Cataloguing of Museum Collections 62 



HiNE— On Diptera of the Family Ephydridae 6av 



Hi.xE— The Birds of Ohio 66 



Walton— A Practical I)i.ssecting Tray 66 



CJRIGGS— The Thickness of the Colundnis Limestone 67 



SCHAFKNEK -Poisonous and Other Injurious Plants of Ohio (concludedl 69' 



News and Notes 74 



NOTES ON THE INTRODUCTION OF THE ASIATIC 

 LADYBIRD (Chilocorus similisj IN OHIO. 



A. F. Burgess. 



It is now a little over two years since the first shipment of this 

 in.sect was made to this country. Mr. C. L- Marlatt, P'irst Assist- 

 ant Entomologist to the United States Department of Agricul- 

 ture collected the beetles while making explorations in Japan and 

 China to ascertain the native home of the San Jose scale. In 

 northern China he found that this scale was present on native 

 trees and also on the fruit exposed for sale in the markets ; very 

 few .scales were found on the fruit and the trees were not seriously 

 infested. I^adybirds of this .species were very common and were 

 frequently found feeding on the scales. 



Three shipments were sent to Washington, D. C, but only two 

 of the beetles survived the winter of igoi-1902. They were 

 placed on trees infested with Diaspis pentagona and a large num- 

 ber of adults had developed late the following summer so that a 

 few shipments were made to different points in the United States. 



Chiloconis similis is a .small black lady beetle, the distinctive 

 markings being a dark red and somewhat circular .sjDot on each 

 elytron. The adults resemble our native species Chilocorus bivul- 

 nenis,so closely that it is almost impossible to distinguish between 

 them in this stage. The larvae and pupae, however, have char- 



