2684 Insects. 



Affinities of the Stylopites, an Essay. By Edward Newman. 



(Concluded from page 1804). 



§ 3. Anatomy of the Mouth of Stylops. 



Stylops is a small black insect, about a quarter of an inch in 

 length : its head is transverse and its face prone : the width of the 

 head is greatly increased by two large projecting eyes, a very marked 

 character, and that from which its name is derived : these eyes are 

 lateral, hemispherical, prominent, quasi-pedunculate, having the facets 

 few in number and uniformly of lai'ge size : the antennae are inserted 

 in the epicranium, the base of each being equidistant from the eye 

 and a mesial line ; they are six-jointed ; the basal joint is cyathiform ; 

 the second small, short, transverse ; the third equally short as regards 

 its shaft, but emitting anteriorly a large process or ramus, which ex- 

 tends parallel with the antenna to the apex of the fifth joint; the re- 

 maining joints are of nearly equal length, and each of them is about 

 thrice the length of either the first, second or third; the fourth is ob- 

 long, slightly incrassated externally, and the longest of the six : the 

 fifth and sixth are more slender and nearly equal in length. 



Such is the general character of the head and its appendages : the 

 face terminates in a distinct and obtusely trigonate clypeus ; and 

 beneath this clypeus, and having a direction towards the sternum, is 

 the mouth : it consists of the following parts : — 



1. Mandibles or maxilla. These are very distant at the base; 

 apparently seated on small protuberances, linear, slender, lancet- 

 shaped, conniving and actually crossing at the tips : these organs are 

 the only conspicuously apparent representatives of either mandibles 

 or maxilla?. 



2. Maxipalpi. Placed exterior to the preceding, and almost im- 

 mediately adjoining the inferior margin of the eye, large, robust, two- 

 jointed; the basal joint somewhat cyathiform; the apical joint 

 attached somewhat obliquely, rather flattened, and having a slightly 

 acuminate apex. 



3. Labium or mentum. Small, triangular, immovable, anchylosed, 

 having neither palpi, ligula, nor other appendages. 



§ 4. Comparative Anatomy of the Mouth of Stylops. 



It must, in limine, be admitted that the characters of so imperfect 

 a mouth do not lead to any certain or inevitable conclusion ; neither 



