82 THB CANADIAN ENTOMOLOGIST. 



Crew I have B. dentipes, Fabr., captured at Toronto. It is larger than 



the foregoing, reaching sometimes a length of .22 inch or more. Colour 



black, legs wholly or in part pale, head either black with yellow frontal 



spot ( ? ), or yellow {$); the thorax has the sides broadly 



marked with the latter colour. Elytra wnth a broad orange 



or yellow band slightly before the middle, extending from the 



outer margin nearly to the suture, while near the tip is a 



rounded spot of the same colour. The markings are variable 



in extent, but the above description applies to the Canadian Fig. 27. 



form (see Fig. 27). 



In my paper on Coccinellidie (number V. of this series) the genus 

 Scytnnus was not tabulated out, as the species were very poorly deter- 

 mined in collections, and Dr. Horn had just begun the study of them with 

 a view to revision. A short time before the appearance of his paper 

 (cited above) he kindly sent me a synopsis of the Canadian forms known 

 at the moment, and this, with some changes and additions, I append 

 below. 



Most of the Scytnni are broadly oval in outline and quite convex, 

 giving them a nearly hemispherical appearance. A few are more 

 elongate, and present a broken outline at the point of meeting between 

 the prothorax and elytral humeri. All are pubescent. They are found 

 by beating and sweeping during the warm months, while in spring 

 and fall they may be captured on the under sides of stones or of pieces 

 of wood in grassy spots. 



Before attempting to trace the species through the use of a table, the 

 student should familiarize himself with the structure called the meta- 

 coxal line. This is situated on the first ventral abdominal segment, 

 appearing in most species as a fine raised line, describing a curve or arc 

 behind the posterior coxal cavity, reaching from the inner border of the 

 coxal to the neighbourhood of the outer anterior angle of the segment. It 

 is very readily seen by means of any fairly good hand lens, but it is often 

 necessary to move the hind leg on one side, so that the knee is directed 

 straight backwards, otherwise the structure is obscured or covered up. 



Perhaps the reference of S. terminaius to Canada may be open to 

 doubt, but since the record is existent I have included it in the table. 



A, Metacoxal line not forming a complete arc, either joining the first 

 ventral abdominal suture, or running parallel to it outwardly. 



