1918] Crampton—Genitalia of Male Neuroptera, ete. 51 
Planipennia, the hypandrium “hy” is even larger than that of 
Ithone (Fig. 14, “hy’’). In Nemoptera there is a large columna- 
like structure (Fig. 12, “‘co”’) which has been homologized with the 
columna “co” of Chauliodes (Fig. 10), and in addition, a small 
“epicolumna”’ labeled “p’’ has been developed. The columna 
“co” of Fig. 12 bears two lobes at its apex, suggesting a bipartite 
origin for this structure, and it is possible that it may represent the 
united penis hooks “pu” (Figs. 4, and 10) rather than the columna 
“co” of Fig. 10. I have provisionally homologized the lateral 
plates “pa” of Fig. 12, with the paraprocts “pa’”’ of Figs. 17 and 
15; but I am not certain that this is the correct interpretation of 
these structures. The structures labeled “g”’ in Fig. 12 may not 
be the true gonopods, but have been provisionally homologized 
with them. 
Nymphes (Fig. 3) is regarded as one of the least modified forms 
related to the Myrmeleonide; but it has been very difficult to 
interpret the parts aright in this insect, and I am by no means cer- 
tain that the conclusions here reached are the correct ones. The 
hypandrium “hy” is well developed in Nymphes (Fig. 3), and the 
structures apparently homologous with the penis hooks, labeled 
“pu” in Fig. 3, are very large and bear several “prongs.” The 
structure designated “‘sa”’ in the figure probably represents the 
supraanal plate (epiproct), although it may possibly be homologous 
with the anal tubercle instead. I have provisionally homologized 
the lobes “cl?” of Fig. 3 with the copulatory lobes “‘cl”’ of the 
Mecopteron shown in Fig. 18; but there is a possibility that they 
should be homologized with the plates “pa” of Fig. 17 instead. 
The parts of Nymphes (Fig. 3) are disappointingly unlike those of 
the Ascalaphidee (Fig. 1) and Myrmeleonide (Fig. 7), although the 
Ascalaphidee are very similar to the Myrmeleonide in having a 
dorsal plate “sa” (Figs. 1 and 7), which has been interpreted as 
the suranal plate or epiproct, and two elongate lateral processes 
“»”’ provisionally homologized with the gonopods. 
Mantispa (Fig. 5) resembles Nemoptera (Fig. 12) in having a 
well developed hypoproct “hy,” within which is a slender structure 
labeled “‘co” (Fig. 5), which may possibly be homologous with the 
structure interpreted as the columna ‘“‘co” in Fig. 12. The two 
plates “pa” of Mantispa (Fig. 5) are possibly homologous with the 
plates labeled “pa” in Fig. 12 of Nemoptera. 
ee 
