l8gO.] ENTOMOLOGICAL NEWS. 1 19 



with very small, blue-black rings, extending the entire length of 

 the body, and covering the upper as well as the lower part of the 

 thorax; spiracles red. 



It will be seen by the foregoing that my description differs very 

 materially from that of Mr. Jones, and is either a marked variety 

 or a distinct species. 



o 



ELEMENTARY ENTOMOLOGY. 



Fourth Paper THE MOVABLE PARTS OF THE HEAD. 



The antennae or feelers, are jointed appendages inserted on the 

 epicranium between or in front of the eyes. Regular antennae 

 have the joints of similar shape; irregular antennae have the 

 joints of dissimilar shape; intermediate forms of antennae of 

 course occur. Technical names are applied to the different forms 

 of antennae. Of regular antennae the more common forms are: 



Filiform (thread like), having the joints of uniform thickness, 

 or nearly so. 



Seliform or setaceous (bristle like), having the joints succes- 

 sively more and more slender from the base* of the antenna to 

 its apex. 



Subulate (awl shaped), similar to setaceous, but the transition 

 from the thick basal joints to the slender joints is more abrupt. 



Moniliform (necklace like) having the joints globular. 



Serrate (saw like), having the joints triangular, arranged like 

 the teeth of a saw. 



Pectinate (comb like), each joint having a long process or pro- 

 jection on one side, the whole arranged like the teeth of a comb 



(%. 2). 



Pinnate (feather like), each joint having one 

 or more projections on each of two opposite 

 sides, the whole looking like a feather. 



Of irregular antennae, the more common are: 



Clavate (club shaped), having the apical joints 

 somewhat more enlarged than the others. 



Capitate (with a head, knobbed), having the 



Fig. 2. Part of a / \ . . S 



pectinate antenna terminal (apical) joints greatly enlarged to form 



(Chant 'iodes pectini- 



cornis L.). a kllOb. 



* The base of any limb or appendage is that part by which it is attached, directly or 

 indirectly, to the trunk, the apex is the opposite end, farthest from the trunk. 



