The Ohio ^J\^atiiralist, 
PUBLISHED BY 
The Biological Club of ihe Ohio Slate University. 
Volume IV. JANUARY, 1904. No. 3. 
Note.— Titles on pages 49 to 62 iuelu.sive, are Papers ami .\bstracts given at the .\nnual 
Meeting of the Oliio State .Vcadem.v of Science for 1903. Not all title.s appear in table of 
contents. Kach author appears once. 
TABLE OF CONTENTS 
liritGESS— Notes on Introiluction of .\siatie Ladybird (Chilocorus similis) in Ohio 49 
KK'E— Preliminary Keport on the Development of the Gill in Mytilns. ( .-Ibstraet.) 51 
Me.vd— C omparative Chart of the Vertebrate .Skull 52 
Ci.AASSEN— On the Occurrence of Possombronia cristula in Ohio .58^ 
Kellerman ami Jennings — K eport for 1902 on the State Herbarium, including 
Additions to the State Plant List .59^ 
AVestgate— S hore Line Topography Between Toledo and Huron, ()hio 61 
AVai.ton — T he Cataloguing of Museum (.'ollections 62 
lliNE— On Hiptera of the Family Ephydridae 63: 
lliNUC— The Birds of Ohio 66 
Walton— A Practical Dis.secting Tray 66 
(iRiGGS — The Thickness of the Columbus Limestone (ST 
Sen AFKNEK — Poisonous and Other Injurious I’lants of Oliio (<•oncluded) 69' 
News and Notes 74 
NOTES ON THE INTRODUCTION OF THE ASIATIC 
LADYBIRD (Chilocorus similisi IN OHIO, 
A. F. Burgess. 
It is now a little over two years since the first sliipnieiit of this 
iiLsect was made to this country. Mr. C. L- iNIarlatt, First A.s.sist- 
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 ; ver}- 
few scales were found on the fruit and the trees w’ere not seriously 
infested. Ladybirds of this species ivere 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 1901-1902. 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. 
Chilocorus similis is a small black lady beetle, the distinctive 
markings being a dark red and somewhat circular spot on each 
elytron. The adults resemble our native species Chilocorus bivul- 
nous, so closely that it is almost impossible to distinguish between 
them in this stage. The larvae and pupae, however, have char- 
