ENTOMOLOGICAL SOCIETY OF ONTARIO. 



.Form for the Descriptions of Preparatory Stages of Insects. 



Name of Species (if determined) 



Egg- 



Size . . Form Colour Markings .- 



Arrangement Duration Where laid Date r 



Mode of exit of larva Drawing of larva 



Larva. 



(Description taken on 188 .. , after moult.) 



Length— when at rest When in motion , 



Attitude— when at rest .... When disturbed .... Form Head— (Segment No. 1.) — 



Size and form Colour and markings Appendages 



Body — (Segments No. 2—13). — Upper surface — General colour and texture of skin , 



Markings Appendages Spiracles— shape and colour 



Under surface — General colour Markings Appendages 



Thoracic feet Prolegs Food plant Habitat (or 



(mode of concealment) Duration of each moult and succeeding changes , 



Pupa. 



Shape Dimensions Colour and markings r 



Mode of pupation Duration Cocoon (if any) , 



Mode of attachment Locality 



Eemarks. 



Observer- 



Date 



Instructions. — In describing Larva', the description should begin with the head, 

 which is the first segment (making the total number 13). Note first its size, whether 

 largej medium, or small ; next its form, whether flattened, rounded, or pointed, etc. : then, 

 the colour, markings, appendages, etc. Beginning the description of the body with the 

 upper surface, give first its general colour, then the longitudinal lines, beginning with the 

 dorsal. Where other markings occur, begin with the anterior and finish with the posterior 

 segments, following the same order with appendages, such as hairs, spines, horns, tubercles, 

 protuberances, granulations, etc., giving their size, form and colour. In describing the 

 under surface, the general colour, then markings and appendages in the same- 



order as above, finishing with the colour and number of thoracic feet and prolegs. giving 

 their characteristics and markings. 



In speaking of the marking of larva 1 , a line is so called when thin ; if thick, it is 

 termed a stripe : if extra broad, it. is called a band. The mark down the middle of the 

 back is known as the dorsal line : this i< sometimes merely a pulsating vessel seen through 

 the skin. The stripe along the side, at the bottom of which the spiracles are usually 

 situated, is called the stigmatal line. When there is an intervening line between the two 

 lines mentioned, it is called the sub-dorsal line. The space between the dorsal and sub- 

 dorsal lines is called the sub-dorsal space, and between the sub-dorsal and stigmatal lines- 

 the stigmatal space. 



