142 PARASITES OF GIPSY AND BROWN-TAIL MOTHS. 
Table IV includes the results of rearing work in which caterpil- 
lars collected in the open were used. A large proportion of the 
collections, probably half or more, was from localities in which 
Compsilura coneinnata is not as yet established, although it will 
probably have extended its range to include these by the end of 
another year. It will be observed, however, that the number of the 
Compsilura reared is very far in excess of that of any native tachinid 
or other parasites attacking this caterpillar as a host. This is espe- 
cially encouraging in view of the fact that one year ago less than 
one one-hundredth of the proportionate number of Compsilura were 
reared under similar circumstances, and only from material collected 
over a much move restricted area. 
TaBLE V.—Results of rearing work in 1910 to determine progress of imported parasites 
and prevalence of parasitism by native parasites of gipsy-moth caterpillars. 
n R 
Sper = Number 
= ee of moths Number of parasites reared. 
} =) | 5. reared. 
o o | 5 
e Localiti E 3 3 n 3 | 
> ocalities. = 2 | S43 a co cal ASE ee acs 
= RBs oS Be oll Bo |) ae Sean en eieaa eee 
8 ee vee Bowe ee ese eee 
S) Se alps 3 & eS om | o6 a ea! hs S 
3 Solas @ (08 | 8s sao) Ret wee eg aeGeee 
Hq A|4 Poem PES yf Sato (ES aly Seles 4 a= | Qa 
4317 | Wellesley.....-.-- | 1,029] 158 15 WS) essen toe Seve ie Ree ere clle setae c tall eae ees |S eee 
4330 | Stoneham. ..---- 535 | 298 43 81 OF Se eae aoe facie Speed Ih ld pe 
4332 | Wellesley.......- 2,110 | 716) 419 OOM Passe Silman | tech pee |S eek | eee 
ABR lloceoe dose eee (0,00) [> love i) SAL || NG) eek oe Aas oe Se US yee 27 neem | eee 
4334 | Stoneham....... 2,000 | 599 59 | 177 LOS? |e eee Peeps C1) (Aneel HEIN aT 
ASS Tealleei ee GIO SR esas 800 | 300 20 88 (eval aeercae oe [nie SiMe os. sn kG Be 2 ee | 
4340 | Wellesley.......- e250) S46) 2345 28a seers BT (ere eee Paes Seas er Sore ales 
4341 | Swampscott..... | 600] 308] 124] 14449 ee oe. [ee Ge Sh ge: 2 | eae Sas ee 
4349 | Wellesley...-.-.--- a2 000% 9025 303i iSial eee el sees re | SS ore, 
43514 | Medford.......-- 300 | 234] 18] 202 GN See, ee 1225 es belle cease aoe ee 
4351B | Winchester. .--.. - 100 54 5 Ob | eestor ehilnoeteice | bs sbi ellihes See el Meee meee ne 
435M DD anverseaeenee =. 1,500 | 566 30 | 199 Guise eee een Pete etek es Se ei 
4353 | Wilmington..... (eds a|) 69 i es ON |aeetsoe 8 [ic rcascteseeel Ss erence bs aa 
4354 | Winchester. ....- | 110 14 1 6 8 Gob oa seae | 1 ene Sees Ae 
4356 | Wellesley...------ | 1,000 818 245 SAg a ee Soe Dil | SR SEP Yor 23 3.8) [2 2 
4359! in sce Gortercec ers: 1, 125 934 150 S0L pase ses ile Se era Cee aa 3 All 2 eee 
4360 | Stoneham (?).-.. 500 | 207 1} 125 59 HY) acces Acar ea seme |e ee 2 1 
ASG Jia eBevetlyec => se2e- 230 56 + BLOM eter ee ae ae | Sec eve ol | le yee 
4366 | Lexington....... 400 20 1 5) Be Whe 20S = onset erare ce aictatal| Sle. cia eters eel ene 
ARVO. || Shuang Gee aaceoue 1, 000 338 29 139 1D || Raetote SSR ol eee Cae Se SS | eee 
4369 | Marblehead..---- 250 61 4 22 O) ee Breet ee Sele [ieee es o/.il Cae ee | 
ASTON Salem. ss. 22. - 2. 800 | 286 21} 106 Ne re ea tone eel | creer pp eee 
4372 |Stoneham- 
Wiobunn===e2e— 150 | 103 iil 43 pA Ni (eee etree rll Iie AE Se I oe 2 ae 
4373 | Wellesley... ----- 150 65 9 iW terete (ae c ee ae oenerce rs fase ese S31EN | Sa 
Asien Nahant = so = 425 | 181 29} 114 1 eee epee a ae pee en cr oes ate PSE RA 
4378 | Winthrop......-. 300 | 191 18} 128 IL cls 2 sos CP Ge Nk ell ene oo ile eee | ee 
4386 | Burlington....-- 100 37 2 22 eS Se Sears fees SC Eee | | 
4387 | Lexington......- 53 On|eeeeke 4 Dee, ace 2 ae SES 2 SA a ra ee | eee 
4392 | Manchester. -..-. SHOU | adsl | Al ADV a, Sox, tlle AM fel ch evel [lhe a | es | 
Motali= ee 225283), |9° 600k se eee 337 25 2 4 | 14 1 
| 
1 The identity of this tachinid, the puparia of which resemble those of tachina, but which hibernates as a 
pupa, is wholly unknown. The adult has never been reared. 
2 From near site of colony of 1910. Recovery of no significance. Masses of cocoons counted. 
3 A few pupee included in this collection. 
In Table V are included results of rearing work in which collections - 
of gipsy-moth pupze were used. These were largely made in local- 
ities near the center of colonization of Blepharipa scutellata of the 
same year. The number of Blepharipa secured is higher in propor- 
i 
Sel i i “od 
a 
: 
i 
