AUTHOR’S ABSTRACT OF THIS PAPER IsSUED 
BY THE BIBLIOGRAPHIC SERVICE, JULY 19 
THE OLFACTORY ORGANS OF DIPTERA 
N. E. McINDOO 
Bureau of Entomology, Washington, D. C. 
FIFTY-FIVE FIGURES 
CONTENTS 
introductionrandamethods:. 44ers ses eel ea ese eA chee Sh eh. ae cae 457 
PUB eLOMACLOn YA DORCUIN S| pati Mn iil etre Ae S EN 205. sparaiis ind sols olde Seacuehs wpa ble heed 460 
Disposition) of pores In MuscandOmestica. .: 2.5002. .ci.c. os ceuie a ous 460 
GAME ORESUOMCICES He eae MES Pe eats icla eicleic e Giaie a aisha MM eek aR 460 
Gs ORES OnaWwani gs Mayahees eee tise ee kta oak, PAG) DEL 2 em 460 
CROTESLONS Hal TERESA tas teeta MMe at wen oy seec Poy 6 Sze orb A Lcenedbeepate oe Steve ike oe 461 
Disposition, of pores in. OLHEr SPECIESt...,..5 - ts:<%)0- sey om es ces aee lee hed 463 
QP ONES OME LS mmr oe Re ig Se eae Fikes Aied oee eed oie nena ee TAOS 
CHORES OUR WEES ty ts 3s As NERS Somes eo ae RIE AL SRLS OO Te le eS 464 
ee ores| on haljeres20 shih vdeo SA Foe ALAS de dtd ee <da0 Oe 464 
Gmvonresconyapnormaluspecres ane imse e eck chic races er eee: 465 
e. Generic, specific, individual, and sexual variations................ 468 
Senucture of poressn Musca’ domestica... 22: ..0. Vso. ee ae ek 471 
GuaE XGenmalysonWe tures ey aaah eee ahh euc.c icles Bias kd ot eM 471 
Daalindernalestructunes: tercsy i creases est hd chauyscia o> oad hoes otekee «teens 473 
SLENCCUre. Of Pores In ObMEr SPECIES... cldsckicssis- 00s peaks sees snd saan 478 
GUE RIE EN AISEEUeUUNCAee ye ossene ae Hen ass ok eels ovis vid ae ae hatte: 478 
Ome imeernel ShrueuUnreye ato. 25% RULES ELL Ne RR 479 
Reem bering com SARIN eho AES. V2. epee erm Het alae bat da ck dss « ose eget 481 
SUUUTEITIE AS a ed chine oe ae RNR tone Sie Ee Se am 2 Se 482 
UT UH STRE ela Ds OUI 0 RR IR US 9 8 I gi 8 aR am HUE oN 484 
INTRODUCTION AND METHODS 
The results herein recorded are a continuation of the writer’s 
investigation concerning the morphology of the olfactory pores. 
Up to date, including the present results, these organs have been 
carefully studied in Hymenoptera, Coleoptera, Lepidoptera, and 
Diptera. The chief object of the present investigation is to 
determine whether the olfactory pores are better adapted ana- 
tomically than the antennal organs to receive olfactory stimuli. 
457 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 29, NO. 5 
OCTOBER, 1918 
