AMERICAN ENTOMOLOGY. 155 



Spicula, the instrument with, which the female lays her eggs. 



See vagina. 

 Spinous, armed with acute processes or spines. 

 jSpinous-radt'afe, beset with spines in a circle, either concatenate, 



united at their bases, or setaceous, like bristles. 

 Spinulse, spinous processes at the base of the tibia, in Ifymen- 



opterous insects, including velum • they are the '' spines " or 



" spurs " of Degeer, and heeh of Leach. 

 Spiracula, Spiracle, one of the lateral orifices of the trunk and 



abdomen, through which insects respire; the stiijmnta. 

 Spiral, revolving obliquely like a corkscrew ; or rolled up like a 



watch-spring. 

 Spurious, this word is applied to the anterior feet of some of 



the Lepidoptera, in which these members are destitute of nails, 



and not suitable for walking. 

 Spurs, the spinulse. 

 Squama, or scale, a small scale above the haltercs in the Dip- 



tera ; it is composed of two pieces united at their edges, as in 



bivalve shells. 

 Sqnamula, a very small corneous, concavo-convex scale, cover- 

 ing the base of the superior wings in some insects. 

 Squamous, scaly ; covered with scales. 

 Squarrous, scurfy ; consisting of rough scales spreading ever}' 



way, or divided into pieces, standing upright and not parallel 



with the surface. 

 Stellate, star-formed ; with four or five radiating lines. See 



radiated. 

 Stemmata, two or three simple, convex, crystalline bodies on 



the vertex of many insects, resembling the eyes of spiders, &c., 



and probably performing the same functions. 

 Sternum, a carina or corneous process immersed in, or prominent 



on the jyecf us, and which extends longitudinally between the 



anterior feet, often elongated before or behind, or concealed 



by the base of the anterior feet. 

 Sfethidium, the trunJc ; all that part of the body included be- 

 tween the head and abdomen. See thorax. 

 Sfi'jma, an opake spot on the costal margin of the anterior 



wings, of some Neuroptera, &c. ; it is the " anastomosis " 



of Kirby, and the "punctum marginale" of Linne. See 



carpus. 



