4 Psyche [February 
5. First and fourth segments of antennz incrassated 
Microphyilia Stal 
First and fourth segments of antennze not incrassated....... 6 
6. Width of dilation of posterior tibiz less than width across 
7. Length of basal joint of antenne less than twice the length of 
ea dele Pe, LESS oece co nea ee Diactor Perty. 
Length of basal joint of antennz at least twice the length of 
| RECKC Ra: ah ita Semen ae Moa ee Ene IN Anisoscelis Latr. 
8. Second segment of antenne dilated, third also dilated. ...... 9 
Second segment of antenne simple, third dilated, Baldus Stal 
9. Second segment of antenne dilated on both sides 
Chrondrocera Lap. 
Second segment of antenne slightly dilated above, not below, 10 
10. Posterior lateral angles of thorax produced, or sharply angled 
Holymenia Stal 
Posterior lateral angles of thorax not at all produced........ 
Tarpeius Stal 
A PHYLOGENETIC STUDY OF THE TERGA AND WING 
BASES IN EMBIIDS, PLECOPTERA, DERMAPTERA, 
AND COLEOPTERA.! 
By G. C. Crampton, Pu.D., 
Massachusetts Agricultural College, Amherst, Mass. 
In a previous paper, the Plecoptera, Embiids, Hemimerids, and 
Dermaptera, were grouped in a superorder called the Panplecop- 
tera, and a further study would indicate that the Coleoptera might 
be included in this group also. There is some doubt as to the 
Strepsiptera, but certain features point to a rather close relation- 
ship between them and the Coleoptera (as is generally thought to 
be the case, although the investigations of Pierce, 1909, have 
thrown some doubt upon the current idea of their affinities) and it 
is quite possible that the Strepsiptera should likewise be included 
in the superorder mentioned above. 
1 Contribution from the Entomological Laboratory of the Massachusetts Agricultural College, 
Amherst, Mass. 
