21 
“number of collections, including under this head each object or lot of objects 
specially numbered and separately entered on our notes or in the accessions’ 
catalogue of the Station, is'thus nearly 12,000. Besides these mention should 
be made of about 400 microscopical slides of serial sections of oligocheete 
worms made for Professor Smith in the course of his studies of that group. 
LIST OF COLLECTIONS, 
Shallow-water collections with PLPC UN) Saeed i, cas oral Maite fe ee 232 
er SueemUparwern spetubemey y keer iid iy ya ebay at Avene 592 
uantitative collections with DISHETCU SD OMPRTUR Issn 8 a iG te arc ne ee: 999 
Seeosoa and Hotifera, collections 0.0). .c:c300.....c ccc 543 
en ler Monster cus Nita centile ee ee ee ee 490 
Re OC OU Bis Bree Gel 9, Fw seit, so. oe, Gk Ra ee 167 
(tae ai a tte SRS Say 6351 32 TES MS aD aM bs Oe See DM i A a 235 
BR BON ONGC ODA) 350 assess tats Neca yd onGL es Lr 2, 245 
RE FP er EDeO MCHA Hi oknaien ass ghsehie aks cuertt lation, ee 5, 500 
AIC TS RERG  d A Peral 3k Ae ORES ad ERNE ALT Le RR lakh 388 
Ea IME Cee NT hove coh aewewthe: HAE UE, Alu) 9 Gaede koa ok, aban 196 
its. Sci Maa atene, ie Ske east ch eee 59 
ec plo Fs tea BERS MM SSS BCP R MTL LENO SOARES Re i BC Same pA 15 
OL OWES De Is Bue Shae nite en eked hs ye ck ines ne 434 
ENTOMOLOGICAL STUDIES, 
It has been thus far the primary object of the entomological studies made 
by Mr. Hart to make us fully acquainted with each species in all its stages 
‘as a preliminary to investigations along other lines. To this end extensive 
search has been made of all varieties of situation in the waters of the Station 
ifield, the species at each location being listed at each visit and collections 
being also made. The regular typical localities represented by the substa- 
tions have been further searched at regular intervals for two years. About 
five hundred lists and illustrative collections have thus been accumulated. 
The biological observations and breeding-cage experiments made during this 
time are recorded on some seven hundred note slips. 
The Hymenoptera and a large part of the Diptera and Lepidoptera have 
been workea up, and reported upon in a paper on the entomology of the IIli- 
aois River and adjacent waters, published as Article VI. of Volume IV. of the 
Bulletin of the State Laboratory of Natural History. Since this publication 
much additional information concerning these groups has been acquired, 
Sareful studies have been made on some of the smaller Diptera, on the 
vater-beetles, and upon the Neuroptera, Thysanura, and Hydrachnide. 
The dragon-fly collections have been determined by Mr. J. C, Needham, 
ormerly Instructor at Knox College, and by Mr. C. C. Adams, an assistant 
nthe State Laboratory. 
These entomological collections represent some 350 species of insects. Every 
iffort has been made to identify, by breeding, eggs, larve, and pupe of 
asects aquatic in any stage. About 275 hitherto undescribed forms have 
hus been obtained and immature stages of about 225 species. have been 
‘ccurately identified, . 
