1918] Crampton—Genitalia of Male Neuroptera, etc. 49 
roptera, Mecoptera, etc., are usually homologized with the 
so-called “ gonopods”’ of the Ephemerida (Fig. 6, “‘s”’), but, as was 
pointed out in a previous paper (Crampton, 1918), the structures 
labeled “‘s” in Fig. 6 of the Ephemerid, are in reality styli which 
are segmentéd (arthrostyles) in some forms, and are composed 
of a single segment in others. The segmented styli (arthrostyles) 
labeled “‘s” in Fig. 6 of the Ephemerid are borne on the plate 
“hy” situated below the male genitalia, and therefore cannot 
be homologous with the gonopods “g” of Figs. 10, 15, ete., which 
are situated above the male genitalia, and are not borne on the plate 
“hy,” so that I have retained the term “gonopods” for the struc- 
tures labeled ‘“‘g,” in Figs. 10, 15, etc., and have applied the desig- 
nation “arthrostyles” to the segmented styli of the Ephemerida. 
The so-called “mammilliform processes of the penis,” labeled 
“pu” in Fig. 15, and described by Van der Weehle (Megaloptera, 
Coll. Baron de Selys Longchamps) in Corydalis, etc.; may possi- 
bly be homologous with the structure called the titillator by Brun- 
ner von Wattenwyl, 1876, in the Orthoptera, since the structures 
in question are situated above the opening of the ejaculatory ducts 
in Corydalis, etc. (as is the case in the Orthoptera). The structures 
labeled “pu” in Figs. 4, 10, ete., on the other hand, are possibly 
homologous with the so-called penis hooks, or “ penunev”’ of lower 
forms. For the sake of convenience, however, all the structures 
labeled “pu” are here referred to as “penis hooks,” regardless of 
their position with reference to the opening of the ejaculatory ducts. 
Ventral to the penis hooks “pu” of Chauliodes (Fig. 10) is a 
cylindrical column-like structure ‘‘co’’ called the columna in a 
previous discussion of the parts in Neuroptera (Crampton, 1918). 
Below this is the so-called genital valve “hy,” which is homologous 
with the hypandrium or subgenital plate of the lower insects. In 
the lower forms, the plate “hy” of the males frequently bears a 
pair of styli; but I have been unable to find these in any of the 
Neuroptera or Mecoptera thus far examined. The lobe-like 
structure situated above the plate “hy” and labeled “sl” in Fig. 
15, may possibly be homologous with the so-called sublobi of lower 
insects (Crampton, 1918). 
In the Psocid shown in Fig. 17, there is a supraanal plate or 
epiproct “‘sa’’ situated above the anal opening, on either side of 
which is a parapodial plate or paraproct “pa.” I would interpret 
