GLOSSARY 



229 



Decid'uous. Pertaining to being 



shed or cast off, as the gills 



of a frog. 

 Del'toid. Triangular in shape. 

 Di'aphragm. Muscular partition 



between chest and abdomen as 



in mammals. 

 Dip'tera, (Gr. Two Wings). An 



extensive order of insects that 



have but two fully developed 



wings. 

 Duode'num, 183. 

 Du'ra ma'ter, 171. 



Ec'toderm, 120. 



Ec'tosarc, 107. 



Erytron, pi. Elytra. The hard- 

 ened outer wings of some in- 

 sects. 



En'doderm, 120. 



En'dosarc, 107. 



Envi'ronment. The conditions 

 surrounding an animal which 

 influence its growth and de- 

 velopment. 



Epim'eron, pi. epimera. The 

 part just outside of the basal 

 segment of an appendage in 

 Arthropods. 



Esopha'geal. Pertaining to the 

 esophagus. 



Excre'tory. Having the power 

 to excrete or throw off. 



Exten'sor. The muscle that 

 causes extension. 



Ex'serted. Projecting beyond 

 some other part. 



Fa'cet, 28. 



Fe'mur, pi. femora. The thigh 



bone. 

 Piriform. Having the shape of 



a thread or filament. 

 Fissiros'tral. Having the bill 



cleft beyond the horny part. 

 Flabel'late. Fanlike in shape. 

 Fora'men. A small opening. 



Gan'glion. A collection of nerve 

 cells through which nerve fib- 

 ers pass. 



Gas'tric car'ca. Blind sacs ex- 

 tending from the stomach. 



Genic'ulate. Bent abruptly at an 

 angle. 



Go'nys. Under outline of a 

 bird's bill from the tip to the 

 point of union of upper and 

 lower mandibles. 



Grub, 57. 



Gu'la. The part of the neck 

 next to the chin. In insects 

 the plate under the submen- 

 tum. 



Hae'mal. Pertaining to the 

 heart or blood vessels. 



Ham'uli, 67. 



Haustel'lum. The sucking tube 

 or proboscis of insects. It is 

 made of modified mouth parts. 



Hemip'tera, (Gr. Half Wings). 

 An order of insects having 

 outer wings part hard and part 

 membraneous. 



