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IOWA ACADEMY OP SCIENCES. 
pollen. In no case did they seem to collect nectar in staminate 
flowers. 
Coleoptera — Chry somelidae : {1) 12-imnctata Oliv. ; (2) D. vit- 
tata Fab. 
Hemiptera — Capsidae: Clocorusa sp. 
Cucuinis melo. 
Few observations were made. The yellow flowers open early 
in the morning and remain open the greater part of the day. 
Insect Visitors — 
Hymenoptera — Apidae: A'pis mellifica Linn. 
Coleoptera — Chrysomelidae : Dialrotica vittata Fab. 
In addition, the following visitors were observed on July 
20th, 27th and 30th, 1894: 
Hymenoptera — Apid«: (1) Cercitina cluplci ; (2) Calliopsis 
amlrenifornis Sm. , 2 , frequent; Andrenidae: (3) Augoclilora pura 
Say, 9, frequent; (4) Hcdictus fasciatus , 9 <9, abundant. 
Hiptera — Bombylidm : (5) Sistcechics vulgaris Loew. 
Cucurnis sativus. 
The light yellow flowers are ready to receive the pollen early 
in the morning, but the corolla remains firm much longer than 
in Oucurhita pepo. Honey bees were observed. 
In 1894 observations were continued from July 18th to Sep- 
tember 28th, and the following insects observed: 
Hymenoptera — Apidae: (I) Ajns mellifica Linn,, very abun- 
dant; (2) St. Farg.,,9 , frequent; (3) Ceratina 
dupla Say; {V)Gcdliopsisctn(lreniformis Sm,, 9 $ , frequent; Andre- 
nidae: (5) Agapostemon sp.,9, abundant; (6) Aradialus \ , 
abundant; (7) Cr., 9 , abundant; (V) Hcdictus 
coriaceous Sm. , 9 ; (9) H. fasckdus Nyl. , 9 $ , frequent. 
Hiptera — Holichopidae : (10) Psilopus sipo Say; Bombylidae: 
(11) Sy steed ms cdop)ex? O. S., abundant. 
Lepidoptera — Papilionidae : (12) Pieris p>rotodice Bd. — Lee. 
Coleoietera — Chrysomelidae: (13) Diabrotica vittata Fab. 
Hemiptera — Capsidae: (14) Ccdicoris rapidus Say. 
Numbers 10 and 14 are accidental pollinators. 
Lagenaria vulgaris Ser. 
The musk- scented flowers of the dipper gourd have a funnel 
or bell- shaped calyx with a long tube. The white petals are 
persistent a much longer time than in Gucurbita pepo, and the 
nectar is not so easily accessible and exposed as in Gitridlus and 
