79 
by devouring eleven aphids in eighteen minutes, but fell short of his 
record for fifty-five minutes. 
As an inveterate enemy of M. pisi, this CEcanthus is undoubtedly 
far ahead of Dr. Fletcher's Diplosis in capacity, but unfortunately does 
not appear to be wide-spread, tho it is probably 
common in southern Illinois. 
This species of CEcanthus agreed with none 
of the published descriptions, but I found that 
Mr. C. A. Hart and Mr. J. D. Hood had seen the 
same species and given it the manuscript name of 
conflitens. 
Triphleps insidiosus, an active little flower- 
bug (Fig. 10) frequently impales M. pisi and 
sucks its blood. In our breeding experiments 
with the clover-louse this little intruder had to be 
excluded, as it played mischief with the birth- 
records. 
Podisus (Fig. 11) and Eitschistus (Fig. 12) as nymphs or adults 
destroy a clover-louse once in a while, as I noticed. 
Fig. 10. — Triphleps insid- 
iosus. Enlarged. (Af- 
ter Riley.) 
Fig. 11. — Podisus maculiventris, nymph, 
sucking the blood from a caterpillar. 
Natural size. 
Fig. 12. — Euschistus variolarius. Four dines 
natural size. 
The soldier-beetle (Podabrus rugulosus) was found feeding on M. 
pisi in Maryland, by Johnson. 
A small red mite (Rhyncholophus pa/rvus) was noted by Sander- 
son as feeding on M. pisi in Delaware. 
Let us now turn to the parasites of Macrosiphum pisi. 
Aphidius. — Often there is found on a clover leaf a dead aphid, 
light brown in color, with the body distended, attached to the leaf in a 
somewhat lifelike position by means of a little silken mat, which 
