The Map has a legend that lists out the 5 Divisions of Punjab's Administrative Units.

Province is flanked by two rivers, Indus in the west and Yamuna in the east. The area between Hissar and Bahawalpur is part of the then Bikaner Princely state which falls under the Rajputana province. Areas in yellow represent the Princely states of Faridkot, Patiala, Bahawalpur, Jind etc.

Link: https://en.wikipedia.org/wiki/Punjab_Province_(British_India)#Administrative_divisions

Delhi Division

• Ambala

• Delhi

• Gurgaon

• Hissar

• Karnal

• Rohtak

• Shimla

Jullundur Division

• Ferozepore

• Hoshiarpur

• Jullundur

• Kangra

• Ludhiana

Lahore Division

• Amritsar

• Gujranwala

• Gurdaspur

• Lahore

• Lyallpur (now Faislabad)

• Montgomery (now Sahiwal)

• Sheikhupura

• Sialkot

Rawalpindi Division

• Attock

• Gujrat

• Jhelum

• Rawalpindi

• Shahpur (now in Sargodha)

Multan Division

• Dera Ghazi Khan

• Jhang

• Mianwali

• Multan

• Muzaffargarh

Total area, British Territory 97,209 square miles

Native States of Punjab (Princely States or they were also called Riyasats)

• Patiala

• Jind

• Nabha

• Bahawalpur

• Sirmur

• Loharu

• Dujana

• Pataudi

• Kalsia

• Simla Hill States

• Kapurthala

• Mandi

• Malerkotla

• Suket

• Faridkot

• Siba

• Chamba

• Kahlur (Bilaspur)

Total area, Native States 36,532 square miles

Total area, Punjab 133,741 square miles